Eerie Interlude | Instant | | Exile any number of target creatures you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step. | Svetlin Velinov
Survive the Night | Instant | | Target creature gets +1/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Svetlin Velinov
Broken Concentration | Instant | | Counter target spell.
Madness {3}{U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) | Clint Cearley
Catalog | Instant | | Draw two cards, then discard a card. | Johannes Voss
Deny Existence | Instant | | Counter target creature spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. | Christopher Moeller
Merciless Resolve | Instant | | As an additional cost to cast this spell, sacrifice a creature or land.
Draw two cards. | Chase Stone
To the Slaughter | Instant | | Target player sacrifices a creature or planeswalker.
Delirium — If there are four or more card types among cards in your graveyard, instead that player sacrifices a creature and a planeswalker. | Christine Choi
Fiery Temper | Instant | | Fiery Temper deals 3 damage to any target.
Madness {R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) | Johannes Voss
Geistblast | Instant | | Geistblast deals 2 damage to any target.
{2}{U}, Exile Geistblast from your graveyard: Copy target instant or sorcery spell you control. You may choose new targets for the copy. | Raymond Swanland
Uncaged Fury | Instant | | Target creature gets +1/+1 and gains double strike until end of turn. (It deals both first-strike and regular combat damage.) | Jason Kang
Anguished Unmaking | Instant | | Exile target nonland permanent. You lose 3 life. | Wesley Burt