Realmgorger

At the beginning of your upkeep, exile target land
an opponent controls and put a +1/+1 counter on
Realmgorger. It gains the following effects based
on how many lands are exiled by this effect:
3 or more: trample
5 or more: menace
7 or more: annihilator 3
When Realmgorger leaves play, return all lands
exiled by it under their owners' control.