Abyssal Reckoner

Abyssal Reckoner cannot be blocked.
Whenever Abyssal Reckoner becomes tapped,
look at target opponent's hand and choose a noncreature, nonland card from it. That player
discards that card.
Whenever Abyssal Reckoner becomes untapped,
another target creature you control becomes a
copy of target creature you dont control until
the end of turn.