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 - $37.50
LP - $30.00
MP - $22.50
HP - $15.00
DMG - $7.50