Colo Clawfish

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

When Colo Clawfish becomes monstrous, tap
up to four target creatures. Those creatures
don't untap during their controllers' untap
steps for as long as you control Colo Clawfish.