Stranded Ship Wreckage

Stranded Ship Wreckage enters the battlefield
tapped.
{t}: Add {g} or {u}
{1}, {t}, Sacrifice Stranded Ship Wreckage: Create
two colorless Treasure artifact tokens with
"{t}, Sacrifice this artifact: Add one mana of any
color."
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Polar Knight let the ship return to the wilderness, but
the treasure is returning to the tavern.