Something
Regular
Assassin's Creed
Excalibur, Sword of Eden
Collector Number:
256
Card Type:
Legendary Artifact — Equipment
Mana Cost:
Oracle Text:
This spell costs 
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 
Prints
Formats
Not Legalstandard
Not Legalfuture
Not Legalhistoric
Not Legaltimeless
Not Legalgladiator
Not Legalpioneer
Legalmodern
Legallegacy
Not Legalpauper
Legalvintage
Legalpenny
Legalcommander
Legaloathbreaker
Not Legalstandardbrawl
Not Legalbrawl
Not Legalalchemy
Not Legalpaupercommander
Legalduel
Not Legaloldschool
Not Legalpremodern
Not Legalpredh
Not Legaltlr