Rocket's Mewtwo (14/132) [Gym Challenge Unlimited] Lightning[x2] Corpse-Born enters the battlefield tapped

Corpse-Born enters the battlefield tapped and doesn't untap during your untap step

Set: Beta Edition Type: Sorcery Rarity: Rare Cost: {U}{U} Target player activates a mana ability of each land they control

that source's controller sacrifices that many permanents

Set: Beta Edition Type: Basic Land — Island Rarity: Common ({T}: Add {U}

Set: Alpha Edition Type: Creature — Serpent Rarity: Common Cost: {5}{U} Sea Serpent can't attack unless defending player controls an Island

Rocket's Mewtwo (14/132) [Gym Challenge Unlimited] Lightning[x2] Corpse-Born enters the battlefield tappedSet: Gym Challenge Unlimited Type: Psychic Rarity: Holo Rare Retreat cost: Colorless,Colorless