Secrets of Strixhaven

Creature — Avatar

Reach, trample
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.

Rancorous Archaic

Secrets of Strixhaven Promos

Sorcery

Converge — Target player draws X cards, Together as One deals X damage to any target, and you gain X life, where X is the number of colors of mana spent to cast this spell.

Together as One

Converge — When this creature enters, exile target nonland permanent an opponent controls with mana value less than or equal to the number of colors of mana spent to cast this creature.
{2}: Put target card from a graveyard on the bottom of its owner's library.

Sundering Archaic

Vigilance
Converge — When this creature enters, you may draw X cards, where X is the number of colors of mana spent to cast this spell. If you draw one or more cards this way, discard two cards.

Transcendent Archaic

Secrets of Strixhaven Mystical Archive

Converge — Exile target nonland permanent if its mana value is less than or equal to the number of colors of mana spent to cast this spell.

Prismatic Ending

Reach, trample
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.
Whenever you cast an instant or sorcery spell, creatures you control get +1/+0 until end of turn for each color of mana spent to cast that spell.

Magmablood Archaic

Reach, trample
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.
Whenever you cast a creature spell, that creature enters with X additional +1/+1 counters on it, where X is the number of colors of mana spent to cast it.

Wildgrowth Archaic

Converge — Search your library for a creature, instant, or sorcery card with mana value less than or equal to the number of colors of mana spent to cast this spell, exile that card, then shuffle. You may cast that card without paying its mana cost.

Bring to Light

Converge — Target player discards X cards, where X is the number of colors of mana spent to cast this spell.

Arcane Omens

Converge — Archaic's Agony deals X damage to target creature, where X is the number of colors of mana spent to cast this spell. Exile cards from the top of your library equal to the excess damage dealt to that creature this way. You may play those cards until the end of your next turn.

Archaic's Agony

Fractal

Converge — Create two 0/0 green and blue Fractal creature tokens. Put X +1/+1 counters on each of them and you gain X life, where X is the number of colors of mana spent to cast this spell.

Snarl Song

Lorwyn Eclipsed Commander

Converge — You draw X cards and lose X life, where X is the number of colors of mana spent to cast this spell.

Painful Truths

Avatar: The Last Airbender Eternal

Converge — Return up to X permanent cards from your graveyard to your hand, where X is the number of colors of mana spent to cast this spell.
Exile Uncle's Musings.

Uncle's Musings

Edge of Eternities Commander

Artifact Creature — Construct

Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.
Remove a +1/+1 counter from this creature: Add one mana of any color.
{T}: Put a +1/+1 counter on this creature.

Crystalline Crawler

Dominaria United Commander

Converge — Radiant Flames deals X damage to each creature, where X is the number of colors of mana spent to cast this spell.

Radiant Flames

Modern Horizons 2

Thopter

Converge — Create a 1/1 colorless Thopter artifact creature token with flying for each color of mana spent to cast this spell.

Sweep the Skies

Creature — Vampire Wizard

Converge — When this creature enters, each opponent loses X life and you gain X life, where X is the number of colors of mana spent to cast this spell.

Radiant Epicure

Converge — Kaleidoscorch deals X damage to any target, where X is the number of colors of mana spent to cast this spell.
Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Kaleidoscorch

Creature — Plant

Converge — This creature enters with two +1/+1 counters on it for each color of mana spent to cast it.
This creature can't be blocked by creatures with power 2 or less.

Glinting Creeper

The List

Converge — Draw X cards, where X is the number of colors of mana spent to cast this spell. Then discard two cards.

Brilliant Spectrum

Battle for Zendikar Promos

Converge — Gain control of target creature if its power is less than or equal to the number of colors of mana spent to cast this spell.

Exert Influence

Enchantment

Converge — This enchantment enters with a crystal counter on it for each color of mana spent to cast it.
Remove a crystal counter from this enchantment: Tap target creature.
{W}{U}{B}{R}{G}: Scry 3.

Prism Array

Battle for Zendikar

Kor Ally

Converge — Create a 1/1 white Kor Ally creature token for each color of mana spent to cast this spell.

Unified Front

Creature — Elemental

Vigilance, trample
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.

Woodland Wanderer

Instant

Converge — Creatures your opponents control get -X/-0 until end of turn, where X is the number of colors of mana spent to cast this spell.
Draw a card.

Roilmage's Trick

Converge — Put X +1/+1 counters on target creature, where X is the number of colors of mana spent to cast this spell. That creature gains trample until end of turn.

Infuse with the Elements

Creature — Elf Scout Ally

Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.

Tajuru Stalwart

Creature — Elf Warrior Ally

Flying
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.