March of the Machine

Chrome Host Seedshark | Creature | Phyrexian Shark | Flying Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.) | Donato Giancola

Furtive Analyst | Creature | Human Wizard | Vigilance {2}, {T}: Draw a card, then discard a card. | Marcela Bolívar

Invasion of Segovia // Caetus, Sea Tyrant of Segovia | Battle // Legendary Creature | Siege // Serpent | (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 Segovia enters, create two 1/1 blue Kraken creature tokens with trample. // Noncreature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a noncreature spell pays for {1} or one mana of that creature's color.) At the beginning of your end step, untap up to four target creatures. | Edgar Sánchez Hidalgo

Preening Champion | Creature | Bird Knight | Flying When Preening Champion enters the battlefield, create a 1/1 blue and red Elemental creature token. | Alix Branwyn

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

Errant and Giada | Legendary Creature | Human Angel | Flash Flying You may look at the top card of your library any time. You may cast spells with flash or flying from the top of your library. | Cristi Balanescu

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

Baral and Kari Zev | Legendary Creature | Human | First strike, menace Whenever you cast your first instant or sorcery spell each turn, you may cast a spell with lesser mana value that shares a card type with it from your hand without paying its mana cost. If you don't, create First Mate Ragavan, a legendary 2/1 red Monkey Pirate creature token. It gains haste until end of turn. | Fariba Khamseh

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

Zimone and Dina | Legendary Creature | Human Dryad | Whenever you draw your second card each turn, target opponent loses 2 life and you gain 2 life. {T}, Sacrifice another creature: Draw a card. You may put a land card from your hand onto the battlefield tapped. If you control eight or more lands, repeat this process once. | Lie Setiawan