Watchmaker Windmill

When a creature dies you may {t} this and exile
the creature and put Swinging counters equal to
its converted mana cost
While this has Swinging counters it can't untap
At the beginning of your upkeep remove a
Swinging counter and Craft 1
When there are no more counters put the
creature into its owners graveyard and this deals
damage equal to its toughness to its owner