Metalcrafted Scorpion

Modular X (This comes into play with X +1/+1
counters on it. When it's put into a graveyard, you
may put its +1/+1 counters on target artifact
creatures.)
When this card dies, add three Swamps from
your library to your hand, then shuffle.
{b}{w}{t}: This card gets sent to the Graveyard,
then returns to the battlefield on your next
upkeep.