Panter, Addicts Savior

When Panter, Addicts Savior enters, create four 1/1 colorless Human creature tokens.

Safe Haven — As long as Panter, Addicts Savior is
on the battlefield Humans you control have "{t} put
a cast counter on this creature. You may pay {x} where X is equal to the number of cast counters on this creature. If you do, you may put a nonland permanent from your hand onto the battlefield."