Mikaeus, the Unhallowed (Borderless Textured Foil Frame Break) [Commander Masters] Beast Elemental Dinosaur If Underdark Beholder would be

If Underdark Beholder would be dealt damage

Return three lands you control to their owner's hand: Return Pearl Lake Ancient to its owner's hand

you'll understand why

000 Type: Sorcery Rarity: Rare Cost: {3}{B}{B}{B} Destroy all nonartifact creatures

Mikaeus, the Unhallowed (Borderless Textured Foil Frame Break) [Commander Masters] Beast Elemental Dinosaur If Underdark Beholder would beSet: Commander Masters Type: Legendary Creature Zombie Cleric Rarity: Mythic Cost: {3}{B}{B}{B} Intimidate Whenever a Human deals damage to you, destroy it. Other non Human creatures you control get +1 +1 and have undying. (When a creature with undying dies, if it had no +1 +1 counters on it, return it to the battlefield under its owner's control with a +1 +1 counter on it.)