The only big factor here is whether you have artifacts worth copying, but if you build your deck right that shouldnt be an issue
Artifacts like Coat of Arms or Argentum Armor, auras like Green's own Blanchwood Armor, and everything in between
Later on, you could be making Wurmcoil Engines or Combustible Gearhulks, and if you happen to have a token doubler like Anointed Procession on hand, it will not be difficult to run away with games
As a baseline, a substantially larger portion of the category can sacrifice themselves to draw cards or can be cycled away, meaning when you find the card late, its not a dead draw
On paper, it seems pretty balanced and self-restricting, for sure there won't be any oppressive card with this ability
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