Murders at Karlov Manor

Officious Interrogation | Instant | | This spell costs {W}{U} more to cast for each target beyond the first. Choose any number of target players. Investigate X times, where X is the total number of creatures those players control. | Borja Pindado

Drag the Canal | Instant | | Create a 2/2 white and blue Detective creature token. If a creature died this turn, you gain 2 life, surveil 2, then investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Josh Hass

Lazav, Wearer of Faces | Legendary Creature | Shapeshifter Detective | Whenever Lazav, Wearer of Faces attacks, exile target card from a graveyard, then investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Whenever you sacrifice a Clue, you may have Lazav become a copy of a creature card exiled with it until end of turn. | Wisnu Tan

Doppelgang | Sorcery | | For each of X target permanents, create X tokens that are copies of that permanent. | Chris Rallis

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

Assassin's Trophy | Instant | | Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle. | Dmitry Burmak

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