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
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
Confirm Suspicions | Instant | | Counter target spell.
Investigate three times. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | David Gaillet
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
Engulf the Shore | Instant | | Return to their owners' hands all creatures with toughness less than or equal to the number of Islands you control. | Cliff Childs
Epiphany at the Drownyard | Instant | | Reveal the top X plus one cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard. | Titus Lunter
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
Jace's Scrutiny | Instant | | Target creature gets -4/-0 until end of turn.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Slawomir Maniak
Just the Wind | Instant | | Return target creature to its owner's hand.
Madness {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.) | Christopher Moeller
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