Eternal Taskmaster
Creature — Zombie
This creature enters tapped.
Whenever this creature attacks, you may pay 
. If you do, return target creature card from your graveyard to your hand.
Sometimes she considered how much easier it would have been to stay dead.
Chris Seaman
Foundations Jumpstart (J25)
• #117Rulings
You can't pay {2}{B} more than once each time Eternal Taskmaster's ability resolves.
(wotc • 2019-05-03)
Rulings
You can't pay {2}{B} more than once each time Eternal Taskmaster's ability resolves.
(wotc • 2019-05-03)