
Humble the Brute | Instant | | Destroy target creature with power 4 or greater.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Daarken

Silverstrike | Instant | | Destroy target attacking creature. You gain 3 life. | Lius Lasahido

Tenacity | Instant | | Creatures you control get +1/+1 and gain lifelink until end of turn. Untap those creatures. | Zoltan Boros

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

Compelling Deterrence | Instant | | Return target nonland permanent to its owner's hand. Then that player discards a card if you control a Zombie. | Seb McKinnon

Essence Flux | Instant | | Exile target creature you control, then return that card to the battlefield under its owner's control. If it's a Spirit, put a +1/+1 counter on it. | Seb McKinnon

Invasive Surgery | Instant | | Counter target sorcery spell.
Delirium — If there are four or more card types among cards in your graveyard, search the graveyard, hand, and library of that spell's controller for any number of cards with the same name as that spell, exile those cards, then that player shuffles. | Steven Belledin

Dance with Devils | Instant | | Create two 1/1 red Devil creature tokens. They have "When this creature dies, it deals 1 damage to any target." | Wayne England

Dissension in the Ranks | Instant | | Target blocking creature fights another target blocking creature. | Jakub Kasper

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

Inner Struggle | Instant | | Target creature deals damage to itself equal to its power. | Mathias Kollros

Lightning Axe | Instant | | As an additional cost to cast this spell, discard a card or pay {5}.
Lightning Axe deals 5 damage to target creature. | Jason A. Engle

Moonlight Hunt | Instant | | Choose target creature you don't control. Each creature you control that's a Wolf or a Werewolf deals damage equal to its power to that creature. | Joseph Meehan