Hungry Constrictor

When Hungry Constrictor enters the battlefield,
choose target creature and tap it. That creature
doesn't untap during its controller's untap step for
as long as you control Hungry Constrictor.

{4}{u}{b}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it
becomes monstrous.)

When Hungry Constrictor becomes monstrous,
destroy the chosen creature.