March of the Machine

Sun-Blessed Guardian // Furnace-Blessed Conqueror | Creature // Creature | Human Cleric // Phyrexian Cleric | {5}{R/P}: Transform Sun-Blessed Guardian. Activate only as a sorcery. ({R/P} can be paid with either {R} or 2 life.) // Whenever Furnace-Blessed Conqueror attacks, create a tapped and attacking token that's a copy of it. Put a +1/+1 counter on that token for each +1/+1 counter on Furnace-Blessed Conqueror. Sacrifice that token at the beginning of the next end step. | Brian Valeza

Furnace Gremlin | Creature | Phyrexian Gremlin | {1}{R}: Furnace Gremlin gets +1/+0 until end of turn. When Furnace Gremlin dies, incubate X, where X is its power. (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.) | Tuan Duong Chu

Invasion of Mercadia // Kyren Flamewright | Battle // Creature | Siege // Goblin Spellshaper | (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 Mercadia enters, you may discard a card. If you do, draw two cards. // {2}{R}, {T}, Discard a card: Create two 1/1 blue and red Elemental creature tokens. Creatures you control get +1/+0 and gain haste until end of turn. | Cristi Balanescu

Khenra Spellspear // Gitaxian Spellstalker | Creature // Creature | Jackal Warrior // Phyrexian Jackal | Trample Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) {3}{U/P}: Transform Khenra Spellspear. Activate only as a sorcery. ({U/P} can be paid with either {U} or 2 life.) // Trample, ward {2}, prowess, prowess (Each instance of prowess triggers separately.) | Artur Nakhodkin

Mirror-Shield Hoplite | Creature | Human Soldier | Vigilance Whenever a creature you control becomes the target of a backup ability, copy that ability. You may choose new targets for the copy. This ability triggers only once each turn. | Alex Brock

Invasion of Kaladesh | Battle | Siege | (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 Kaladesh enters the battlefield, create a 1/1 colorless Thopter artifact creature token with flying. | Leon Tukker

Invasion of Azgol | Battle | Siege | (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 Azgol enters the battlefield, target player sacrifices a creature or planeswalker and loses 1 life. | Joshua Raphael

Invasion of Ergamon // Truga Cliffcharger | Battle // Creature | Siege // Rhino | (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 Ergamon enters, create a Treasure token. Then you may discard a card. If you do, draw a card. // Trample When Truga Cliffcharger enters, you may discard a card. If you do, search your library for a land or battle card, reveal it, put it into your hand, then shuffle. | Manuel Castañón