Enchantment 2

Enchant creature
Enchanted creature can't be blocked and has
"Whenever this creature deals combat damage to
a player or planeswalker, you may pay {1}. If you
do, it sudies." (Reveal the top two cards of your
library.Put one of them into exile and the other on the
bottom of your library. You may play the exiled card
as long as you control the creature that studied it.)