Aisling Potfiller Leprechaun

When Aisling Potfiller Leprechaun enters the battlefield, create a Treasure token. (It's an
artifact with "Tap, Sacrifice this artifact: Add one
mana of any color.")
When an opponent casts a spell or a creature
attacks, exile Aisling Potfiller Leprechaun.
Return it to the battlefield under its owner's
control at the beginning of the next end step.
Aisling Potfiller Leprechaun is unblockable.