Murders at Karlov Manor

Assemble the Players | Enchantment | | You may look at the top card of your library any time. Once each turn, you may cast a creature spell with power 2 or less from the top of your library. | Evyn Fong

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

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