This spell costs less to cast, where X is the total mana value of historic (Artifacts, legendaries, and Sagas are historic.) permanents you control.
Equipped creature gets +10/+0 and has vigilance (Attacking doesn't cause this creature to tap.).
Equip legendary creature (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)
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