Adamantine Colossus

Modular 6 (This enters the battlefield with six +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)
Whenever Adamantine Colossus or another
Construct you control dies, you may put it on
top of your library instead of anywhere else.
{w}, Remove a +1/+1 counter from a Construct
you control: Exile target nonartifact card from a
graveyard.