Excalibur, Sword of Eden 72/110 (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 - $26.10
LP - $20.90
MP - $15.70
HP - $10.50
DMG - $5.30