Funeral Room // Awakening Hall (Borderless) [Duskmourn: House of Horror] IDW Comics 2013 They mutate into the creature

They mutate into the creature on top plus all abilities from under it

Set: Streets of New Capenna Tokens Type: Token Artifact — Treasure Rarity: Common {T}

Or a little triangle froggy thing

Set: War of the Spark Type: Sorcery Rarity: Mythic Cost: {X}{B}{B} Destroy up to three target creatures with toughness X or less

Set: Assassin's Creed Type: Legendary Creature — Human Assassin Rarity: Rare Cost: {3}{R}{W} Double strike

Funeral Room // Awakening Hall (Borderless) [Duskmourn: House of Horror] IDW Comics 2013 They mutate into the creatureSet: Duskmourn: House of Horror Type: Enchantment Room Enchantment Rarity: Mythic Cost: {2}{B} {6}{B}{B} Funeral Room Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life. Awakening Hall When you unclock this door, return all creature cards from your graveyard to the battefield. You may cast either half. That door unlocks on the battlefield. As a sorcery you may pay the mana cost of a locked door to unlock it.)