Excalibur Sword of Eden 72 (Universes Beyond: Assassin's Creed)

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/+0 and has vigilance. Equip legendary creature {2}

NM - $19.50
LP - $15.60
MP - $11.70
HP - $7.80
DMG - $3.90