Jace, Unraveler of Secrets [Shadows over Innistrad Prerelease Promos] Sliver Mutant Set: Betrayers of Kamigawa Promos

Set: Betrayers of Kamigawa Promos Type: Legendary Creature — Rat Ninja Rarity: Rare Cost: {4}{B}{B} Ninjutsu {3}{B}{B} ({3}{B}{B}

Whenever Grim Flayer deals combat damage to a player

Set: Onslaught Type: Instant Rarity: Uncommon Cost: {U} Return target nonland permanent to its owner's hand

the Mutable becomes a Human with base power and toughness 1/1

If each of those creatures could block all creatures that the other is blocking

Jace, Unraveler of Secrets [Shadows over Innistrad Prerelease Promos] Sliver Mutant Set: Betrayers of Kamigawa PromosSet: Shadows over Innistrad Prerelease Promos Type: Legendary Planeswalker Jace Rarity: Mythic Cost: {3}{U}{U} +1: Scry 1, then draw a card. 2: Return target creature to its owner's hand. 8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell."