Mr. Watternoose

{1},{t}: Place an Authority Counter on Mr. Watternoose.
Mr. Watternoose has Hexproof so long as he has
three or more Authority Counters on him.
Remove X Authority Counters from Mr. Watternoose, {t}: Exile target creatures with total toughness X or less. Your opponent may pay {x} to counter this ability.