Sorcery — Adventure

Return target Booster Fun card from your graveyard to your hand.

Only the Best

2019 Heroes of the Realm

Creature — Bird

Flying, protection from common
Whenever Collectigull attacks, reveal the top card of your library. If it's a Booster Fun card, you may put it into your hand.

Collectigull

Legendary Creature — Merfolk Rogue

Flash
You may cast Secret Lair spells as though they had flash.
Secret Lair spells you cast cost {1} less to cast.

Keeper of the Secret Lair

Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Each player may put a planeswalker or Zombie card from War of the Spark from their hand or graveyard onto the battlefield.
II — Sacrifice any number of creatures and/or planeswalkers. Each opponent sacrifices that many creatures and/or planeswalkers.
III — Exile up to one target Bolas. Proliferate three times.

War of the Spark

You may put a legendary creature card from your hand into the command zone. It's also your commander.

Join the Group

Legendary Creature — Human Archer

Reach
Commanders you control get +X/+0, where X is the number of commanders you control.

Champions of Archery

Legendary Snow Creature — Elk

As an additional cost to cast this spell, you may open a sealed Magic booster pack and put the cards on the bottom of your booster pile in a random order.
Spells you cast have booster cascade. (It's like cascade, but use your booster pile rather than your library.)

Myntasha, Honored One

Legendary Creature — Phoenix

Flying, haste, protection from red
{1}, {T}: Return target legendary creature card from your graveyard to the battlefield.
Tap six untapped creatures you control: Return The Cinematic Phoenix from your graveyard to the battlefield. If you tapped six legendary creatures this way, you win the game.

The Cinematic Phoenix

Legendary Land — Mountain

{W}{U}{B}{R}{G}, {T}: Creatures you control gain landwalk until end of turn.