Murders at Karlov Manor

Doorkeeper Thrull | Creature | Thrull | Flash Flying Artifacts and creatures entering the battlefield don't cause abilities to trigger. | Camille Alquier

Tenth District Hero | Creature | Human | {1}{W}, Collect evidence 2: Tenth District Hero becomes a Human Detective with base power and toughness 4/4 and gains vigilance. {2}{W}, Collect evidence 4: If Tenth District Hero is a Detective, it becomes a legendary creature named Mileva, the Stalwart, it has base power and toughness 5/5, and it gains "Other creatures you control have indestructible." | Kai Carpenter

Unyielding Gatekeeper | Creature | Elephant Cleric | Disguise {1}{W} (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 Unyielding Gatekeeper is turned face up, exile another target nonland permanent. If you controlled it, return it to the battlefield tapped. Otherwise, its controller creates a 2/2 white and blue Detective creature token. | Borja Pindado

Homicide Investigator | Creature | Human Detective | Whenever one or more nontoken creatures you control die, investigate. This ability triggers only once each turn. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Jodie Muir

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

Sharp-Eyed Rookie | Creature | Human Detective | Vigilance Whenever a creature enters the battlefield under your control, if its power is greater than Sharp-Eyed Rookie's power or its toughness is greater than Sharp-Eyed Rookie's toughness, put a +1/+1 counter on Sharp-Eyed Rookie and investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Jake Murray

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