Froghemoth

Trample
When Froghemoth enters the battlefield, gain control of target non-Frog creature for as long as you control Froghemoth. That creature can't attack or block and its activated abilities can't be activated. At the beginning of your upkeep, put a -1/-1 counter on that creature. If you do, put a +1/+1 counter on Froghemoth.
Swift tongue, slow digestion.