Excalibur, Sword of Eden [Assassin's Creed]

Set: Assassin's Creed Type: Legendary Artifact — Equipment Rarity: Rare Cost: {12} This spell costs {X} less to cast, where X is the total mana value of historic permanents you control. (Artifacts, legendaries, and Sagas are historic.)Equipped creature gets +10/+10 and has vigilance.Equip legendary creature {2}