Planechase

Arcbound Crusher

Trample
Whenever another artifact enters the battlefield, put a +1/+1 counter on Arcbound Crusher.
Modular 1 (This enters the battlefield with a +1/+1 counter on it. When it's put into a graveyard, you may put its +1/+1 counters on target artifact creature.)

Trample
Whenever another artifact enters, put a +1/+1 counter on Arcbound Crusher.
Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Darksteel

Trample
Whenever another artifact comes into play, put a +1/+1 counter on Arcbound Crusher.
Modular 1 (This comes into play with a +1/+1 counter on it. When it's put into a graveyard, you may put its +1/+1 counters on target artifact creature.)