Clockwork Tower Scrapyard

Clockwork Tower Scrapyard enters the
battlefield tapped.
{t}: Add {w} or {u}
{1}, {t}, Sacrifice Clockwork Tower Scrapyard:
Create two colorless Treasure artifact tokens with
"{t}, Sacrifice this artifact: Add one mana of any
color."
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Tinker Knight doesn't usually keep a stash of loot.
Most of his funds end up as wasted materials.