Drowzee

Evolve - {1}{u}{b}: Search your library for a card named Hypno and place it onto the battlefield tapped. Exile Drowzee.

Hypnosis - {u}{b}: Exert Drowzee and roll a D6.
Place sleep counters onto target creature or planeswalker equal to the result. That permanent can’t attack, block, or use activated abilities for as long as it has a sleep counters on it. At the beginning of its owners upkeep, remove a sleep counter. You may discard two cards to repeat this process.