Nah-Radi, Insomnia Trader

Cacoon ({x}, {t}, Put X +1/+1 Counters on Nah
Radi: This creature becomes dormant for X turns.
(It loses all abilities and can't block or attack.))
Whenever you put 1 or more +1/+1 Counters on
Nah-Radi, create a 0/1 Thought creature token
with "Search your opponent's library for a card
and put it in your hand, and then your opponent
may do the same with your library, and puts the
card in his or her hand. Shuffle both libraries.