Merow, Famed Explorer

Metalcraft - Merow, Famed Explorer has
vigilance and can't be blocked as long as you
control three or more artifacts.
Landfall - Whenever a land enters the battlefield
under your control, you may put a +1/+1
counter on Merow. If you do, creatures you
control get +1/+1 until end of turn.
"I'm gonna find it all! You coming? "