Conquest of Vines

Overwhelm-At the end of your turn, if you
control at least 4 more creatures than an
opponent, put a +1/+1 counter on each creature
you control and create a 0/1 plant creature token
"Our walls were strong. Our garrisons were large. No
goblin horde could challenge us. But then, the vines
came."
-Andir, Klavian Engineer