Sea Serpent (Retro) [30th Anniversary Edition] Phyrexian Construct you gain control of target

you gain control of target opponent during that player's next turn

sacrifice Merchant Ship

Set: Beta Edition Type: Artifact Rarity: Uncommon Cost: {3} {2}

Set: Kaldheim Prerelease Promos Type: Legendary Creature — Dwarf Berserker Rarity: Rare Cost: {1}{R} Other Dwarves you control get +1/+0

Set: Ultimate Masters Type: Artifact Rarity: Mythic Cost: {1} Mana Vault doesn't untap during your untap step

Sea Serpent (Retro) [30th Anniversary Edition] Phyrexian Construct you gain control of targetSet: 30th Anniversary Edition Type: Creature Serpent Rarity: Common Cost: {5}{U} Sea Serpent can't attack unless defending player controls an Island. When you control no Islands, sacrifice Sea Serpent. Legend has it that Serpents used to be bigger, but how could that be?