Murders at Karlov Manor

Connecting the Dots | Enchantment | | Whenever a creature you control attacks, exile the top card of your library face down. (You can't look at it.) {1}{R}, Discard your hand, Sacrifice Connecting the Dots: Put all cards exiled with Connecting the Dots into their owners' hands. | Aaron J. Riley

Fugitive Codebreaker | Creature | Goblin Rogue | Prowess, haste Disguise {5}{R}. This cost is reduced by {1} for each instant and sorcery card in your graveyard. (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) When Fugitive Codebreaker is turned face up, discard your hand, then draw three cards. | Joseph Weston

Pyrotechnic Performer | Creature | Viashino Assassin | Disguise {R} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) Whenever Pyrotechnic Performer or another creature you control is turned face up, that creature deals damage equal to its power to each opponent. | Peter Polach

Blood Spatter Analysis | Enchantment | | When Blood Spatter Analysis enters the battlefield, it deals 3 damage to target creature an opponent controls. Whenever one or more creatures die, mill a card and put a bloodstain counter on Blood Spatter Analysis. Then sacrifice it if it has five or more bloodstain counters on it. When you do, return target creature card from your graveyard to your hand. | Jokubas Uogintas

Worldsoul's Rage | Sorcery | | Worldsoul's Rage deals X damage to any target. Put up to X land cards from your hand and/or graveyard onto the battlefield tapped. | Lius Lasahido