Agent Washington, last stand

When Agent Washington, last stand enters
the battlefield, destroy target creature that's
not yours, then create a copy of that creature
and put that on target player's battlefield.
Agent Washington. last stand gains +1/+1
for every artifact on the battlefield when he
enters the battlefield.
when an artifact is played at any time, on
anyone's battlefield, put a +1/+1 counter on
Agent Washington, last stand