Pick the Brain
{2}{B}
Sorcery
Target opponent reveals their hand. You choose a nonland card from it and exile that card.
Delirium -- If there are four or more card types among cards in your graveyard, search that player's graveyard, hand, and library for any number of cards with the same name as the exiled card, exile those cards, then that player shuffles.
Thought-Knot Seer
{3}{C}
Creature -- Eldrazi
4/4
({C} represents colorless mana.)
When ~this~ enters, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When ~this~ leaves the battlefield, target opponent draws a card.