Fisherman's Cruelty

When Fisherman's Cruelty enters the battlefield,
exile target creature an opponent controls. At the beginning of your end step, if Fisherman's Cruelty
is on the battlefield, create a token that's a copy
of the exiled creature.
When Fisherman's Cruelty leaves the battlefield,
return the exiled creature to it's owners hand.
Mermaid's are quick, but humans can be quicker.