Kremy, Junkyard Scavenger

Skulk (This creature can't be blocked by creatures
with greater power.)
Whenever Kremy, Junkyard Scavenger enters the battlefield or attacks, create a Treasure token.

Sacrifice an artifact: Draw a card.
Activate only once each turn.
{2}{u}{r}, Sacrifice three Treasures: Return target artifact
card from your graveyard to the battlefield.