Strixhaven Stadium [Strixhaven: School of Mages Prerelease Promos]Set: Strixhaven: School of Mages Prerelease Promos Type: Artifact Rarity: Rare Cost: {3} {T}: Add {C}. Put a point counter on Strixhaven Stadium. Whenever a creature deals combat damage to you, remove a point counter from Strixhaven Stadium. Whenever a creature you control deals combat damage to an opponent, put a point counter on Strixhaven Stadium. Then if it has ten or more point counters on it, remove them all and that player loses the game.

Fire of Kaladesh

return it to your hand at the beginning of the next end step

Set: Scars of Mirrodin Type: Creature — Cat Cleric Rarity: Rare Cost: {1}{W} Players can't search libraries

Seekers spend their lives protecting a home they rarely visit

that player sacrifices a nonbasic land

Play with your libraries' top cards revealed

Set: Dragons of Tarkir Type: Legendary Creature — Elder Dragon Rarity: Mythic Cost: {3}{W}{U} Flying

Exile a land card from your graveyard: Hostile Desert becomes a 3/4 Elemental creature until end of turn

Set: Ikoria: Lair of Behemoths Promos Type: Legendary Creature — Elemental Otter Rarity: Rare Cost: {1}{U/R}{U/R} Companion — Each nonland card in your starting deck has a different name

When Wormfang Behemoth leaves the battlefield

Set: Commander 2020 Type: Instant Rarity: Rare Cost: {3}{B} If you control a commander

Set: World Championship Decks 1999 Type: Artifact Rarity: Rare Cost: {5} {X}