Secrets of Strixhaven Commander

Creature — Angel Spirit

Flying, protection from black
Echo {3}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, return target creature card from your graveyard to the battlefield.

Karmic Guide

Magic × Duel Masters Promos

Creature — Cat

Echo {G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Pouncing Jaguar

March of the Machine Commander

Creature — Phyrexian Minion

Flying
Echo {2}{B} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target nonartifact, nonblack creature.

Bone Shredder

Unknown Event

Legendary Creature — Human Wizard

Echo {3}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When The Keeper of Four Scythes enters, create four Scythe tokens. (They're Equipment with "Equipped creature gets +1/+1" and equip {2}.)
Equipped creatures you control get +1/+1.

The Keeper of Four Scythes

Dominaria Remastered

Goblin

Mogg War Marshal

Creature — Goblin Warrior

Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters or dies, create a 1/1 red Goblin creature token.

Artifact

Echo {6} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{T}: Draw a card.

Urza's Blueprints

The List (Unfinity Foil Edition)

Summon — Dinosaur

Phasing, cumulative upkeep {1}, echo {G}{G}, fading 3, bands with other Dinosaurs, protection from Homarids, snow-covered plainswalk, flanking, rampage 2

Old Fogey

Modern Horizons 2

Creature — Devil

Haste
Echo—Discard a card. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Rakdos Headliner

Artifact Creature — Juggernaut

Echo {4} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Sacrifice an artifact: Put a +1/+1 counter on target creature.

Extruder

Time Spiral Remastered

Creature — Imp Rebel

Flying, haste
Echo—Discard a card. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Deepcavern Imp

Creature — Gargoyle

Flying
Echo {2}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{R}: This creature gets +0/+1 until end of turn.

Basalt Gargoyle

Creature — Kavu

Echo {5}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 2 damage to target creature.
When this creature leaves the battlefield, it deals 4 damage to target creature.

Firemaw Kavu

Creature — Ogre

Haste
Echo {1}{B} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{B/R}: This creature gets +1/+0 until end of turn.

Henchfiend of Ukor

Echo {3}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, return target creature an opponent controls to its owner's hand.

Stingscourger

Creature — Drake

Flying, haste
Echo {1}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Uktabi Drake

The List

Creature — Human Nomad

Haste
Echo {3}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target land.

Avalanche Riders

Echo {2}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 2 damage to any target.

Ghitu Slinger

Creature — Human Barbarian

Haste
Echo {2}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 3 damage to target player or planeswalker.

Keldon Champion

Creature — Elf

Echo {2}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Yavimaya Granger

Artifact Creature — Construct

Echo {4} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
This creature attacks each combat if able.

Thran War Machine

Creature — Dinosaur

First strike, haste
Echo {2}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Shivan Raptor

Creature — Treefolk

Trample
Echo {1}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Cradle Guard

Creature — Bird

Flying
Echo {2}{U} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Raven Familiar

Modern Horizons

Creature — Orc Warrior

Echo {R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature dies, it deals 2 damage to target player or planeswalker.

Orcish Hellraiser

Eternal Masters

Creature — Hellion Beast

Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 4 damage to each other creature.

Crater Hellion

Artifact Creature — Gnome

Echo {3} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Sacrifice this creature: It deals 1 damage to any target.

Ticking Gnomes

Duel Decks Anthology: Garruk vs. Liliana

Creature — Troll

Echo {1}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{1}{G}: Regenerate this creature.

Albino Troll

Modern Masters

Creature — Giant Warrior

Echo {5}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target creature with flying.

Hammerheim Deadeye

Archenemy

Creature — Bird Beast

Echo {2}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters or dies, put a +1/+1 counter on target creature.

Hunting Moa

Future Sight

Creature — Efreet

Trample
Echo {0} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature's echo cost is paid, each opponent may draw up to three cards.

Shah of Naar Isle

Creature — Elemental

Haste
Echo—Sacrifice two lands. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Skizzik Surger

Planar Chaos

Creature — Elemental Horse

Haste
Echo {5}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, tap all other creatures.

Timbermare

Time Spiral

Echo {2}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Flamecore Elemental

Echo {3}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters or leaves the battlefield, it deals 1 damage to each creature without flying.

Subterranean Shambler

Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
This creature attacks each combat if able.

Tectonic Fiend

Judge Gift Cards 2004

Squirrel

Echo {3}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, create four 1/1 green Squirrel creature tokens.
Squirrel creatures get +1/+1.

Deranged Hermit

Urza's Destiny

Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters or dies, create two 1/1 red Goblin creature tokens.

Goblin Marshal

Creature — Human Rogue

Echo {2}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target artifact.

Keldon Vandals

Urza's Legacy

Creature — Human Soldier

Echo {3}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, you gain 5 life.

Radiant's Dragoons

Echo {G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, draw a card.

Multani's Acolyte

Creature — Ape

Flash
Echo {2}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Simian Grunts

Echo {3} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{1}, {T}: Tap target artifact, creature, or land.

Ring of Gix

Echo {4} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
You may choose not to untap this artifact during your untap step.
{2}, {T}: All creatures get +2/+2 for as long as this artifact remains tapped.

Thran Weaponry

Urza's Saga Promos

Creature — Dragon

Flying
Echo {2}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{R}: This creature gets +1/+0 until end of turn.

Lightning Dragon

Urza's Saga

Creature — Angel

Flying, vigilance
Echo {2}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Herald of Serra

Creature — Goblin

Echo {R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Goblin Patrol

Haste
Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Goblin War Buggy

Creature — Lizard

Echo {2}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Viashino Outrider

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)
Echo {1}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Vug Lizard

Creature — Insect

Echo {1}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Acridian

Creature — Centaur

Shroud (This creature can't be the target of spells or abilities.)
Echo {3}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Citanul Centaurs

Creature — Wurm

Echo {4}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)