Return target creature to its owner's hand. If its mana value was 3 or less, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Draw two cards.

Counter target noncreature spell unless its controller pays {2}.

({T}: Add {U}.)

Target opponent loses 3 life. Flashback {5}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target opponent reveals their hand. You choose a creature or planeswalker card from it. That player discards that card.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Counter target artifact or enchantment spell.

Counter target spell.

Players can't search libraries.

Permanents enter the battlefield tapped.

{T}, Sacrifice an artifact: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Creatures entering the battlefield don't cause abilities to trigger.