Grim Tutor

Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.

Opposition Agent

Flash
You control your opponents while they're searching their libraries.
While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.

Demon

Vampiric Tutor

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Vecna

Rat Rogue

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.