Murders at Karlov Manor

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

Evidence Examiner | Creature | Merfolk Detective | At the beginning of combat on your turn, you may collect evidence 4. (Exile cards with total mana value 4 or greater from your graveyard.) Whenever you collect evidence, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") | Paolo Puggioni

Kellan, Inquisitive Prodigy | Legendary Creature | Human Faerie Detective | Flying, vigilance Whenever Kellan, Inquisitive Prodigy attacks, destroy up to one target artifact. If you controlled that permanent, draw a card. | Joshua Raphael

Repulsive Mutation | Instant | | Put X +1/+1 counters on target creature you control. Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control. | Filip Burburan

Undercover Crocodelf | Creature | Elf Crocodile Detective | Whenever Undercover Crocodelf deals combat damage to a player, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Disguise {3}{G/U}{G/U} (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.) | Nicholas Gregory

Vannifar, Evolved Enigma | Legendary Creature | Elf Ooze Wizard | At the beginning of combat on your turn, choose one — • Cloak a card from your hand. (Put it onto the battlefield face down as a 2/2 creature with ward {2}. Turn it face up any time for its mana cost if it's a creature card.) • Put a +1/+1 counter on each colorless creature you control. | Uriah Voth

Flotsam // Jetsam | Instant // Sorcery | | Mill three cards. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") // Each opponent mills three cards, then you may cast a spell from each opponent's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead. | Anastasia Ovchinnikova

Hustle // Bustle | Instant // Sorcery | | Target creature attacks or blocks this turn if able. // Creatures you control get +2/+2 and gain trample until end of turn. You may turn a creature you control face up. | Valera Lutfullina

Leyline of the Guildpact | Enchantment | | If Leyline of the Guildpact is in your opening hand, you may begin the game with it on the battlefield. Each nonland permanent you control is all colors. Lands you control are every basic land type in addition to their other types. | Daarken

Niv-Mizzet, Guildpact | Legendary Creature | Dragon Avatar | Flying, hexproof from multicolored Whenever Niv-Mizzet, Guildpact deals combat damage to a player, it deals X damage to any target, target player draws X cards, and you gain X life, where X is the number of different color pairs among permanents you control that are exactly two colors. | Chris Rallis