March of the Machine

Invasion of Dominaria // Serra Faithkeeper | Battle // Creature | Siege // Angel | (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When Invasion of Dominaria enters, you gain 4 life and draw a card. // Flying, vigilance | Denys Tsiperko

Phyrexian Censor | Creature | Phyrexian Wizard | Each player can't cast more than one non-Phyrexian spell each turn. Non-Phyrexian creatures enter the battlefield tapped. | Alexey Kruglov

Seraph of New Capenna | Creature | Angel Soldier | Flying {4}{B/P}: Transform Seraph of New Capenna. Activate only as a sorcery. ({B/P} can be paid with either {B} or 2 life.) | Aaron J. Riley

Zhalfirin Lancer | Creature | Human Knight | Whenever another Knight enters the battlefield under your control, Zhalfirin Lancer gets +1/+1 and gains vigilance until end of turn. | Nino Vecia

Xerex Strobe-Knight | Creature | Human Knight | Flying, vigilance {T}: Create a 2/2 white and blue Knight creature token with vigilance. Activate only if you've cast two or more spells this turn. | Pavel Kolomeyets

Compleated Huntmaster | Creature | Phyrexian Elf Warrior | {1}, {T}, Sacrifice another creature or artifact: Incubate 3. (Create an Incubator token with three +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.) | Alex Brock

Harried Artisan | Creature | Human Artificer | Haste {3}{W/P}: Transform Harried Artisan. Activate only as a sorcery. ({W/P} can be paid with either {W} or 2 life.) | Caio Monteiro

Invasion of Regatha // Disciples of the Inferno | Battle // Creature | Siege // Human Monk | (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When Invasion of Regatha enters, it deals 4 damage to another target battle or opponent and 1 damage to up to one target creature. // Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) If a noncreature source you control would deal damage to a creature, battle, or opponent, it deals that much damage plus 2 instead. | Daarken

Kami of Whispered Hopes | Creature | Spirit | If one or more +1/+1 counters would be put on a permanent you control, that many plus one +1/+1 counters are put on that permanent instead. {T}: Add X mana of any one color, where X is Kami of Whispered Hopes's power. | Filipe Pagliuso

Sandstalker Moloch | Creature | Lizard | Flash When Sandstalker Moloch enters the battlefield, if an opponent cast a blue and/or black spell this turn, look at the top four cards of your library. You may reveal a permanent card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. | Donato Giancola

Halo Forager | Creature | Faerie Rogue | Flying When Halo Forager enters the battlefield, you may pay {X}. When you do, you may cast target instant or sorcery card with mana value X from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead. | Kevin Sidharta

Invasion of Amonkhet // Lazotep Convert | Battle // Creature | Siege // Zombie | (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When this Siege enters, each player mills three cards, then each opponent discards a card and you draw a card. (To mill three cards, a player puts the top three cards of their library into their graveyard.) // You may have this creature enter as a copy of any creature card in a graveyard, except it's a 4/4 black Zombie in addition to its other colors and types. | Jokubas Uogintas

Mutagen Connoisseur | Creature | Vedalken Mutant | Flying, vigilance Mutagen Connoisseur gets +1/+0 for each transformed permanent you control. | Alex Brock

Stormclaw Rager | Creature | Ogre Warrior | {1}, Sacrifice another creature or artifact: Put a +1/+1 counter on Stormclaw Rager and draw a card. Activate only as a sorcery. | Nicholas Elias

Elvish Vatkeeper | Creature | Phyrexian Elf | When Elvish Vatkeeper enters the battlefield, incubate 2. (Create an Incubator token with two +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.) {5}: Transform target Incubator token you control. Double the number of +1/+1 counters on it. | Nicholas Gregory