Mowu, Size Shifter

Trample
Mowu, Size Shifter enters the battlefield with 3 +1/+1 counters on it.
Whenever you put any number +1/+1 counters or a loyalty counters on a permanent you control, put that many +1/+1 counters on Mowu.
Remove X +1/+1 counters from Mowu: It can't be blocked by creatures with power X or greater this turn.