Phyrexia: All Will Be One

Atmosphere Surgeon | Creature | Phyrexian Wizard | Whenever you cast a noncreature spell, put an oil counter on Atmosphere Surgeon. Remove an oil counter from Atmosphere Surgeon: Target creature gains flying until end of turn. Activate only as a sorcery. | Campbell White

Blue Sun's Twilight | Sorcery | | Gain control of target creature with mana value X or less. If X is 5 or more, create a token that's a copy of that creature. | Piotr Dura

Bring the Ending | Instant | | Counter target spell unless its controller pays {2}. Corrupted — Counter that spell instead if its controller has three or more poison counters. | LA Draws

Escaped Experiment | Artifact Creature | Phyrexian Beast | Whenever Escaped Experiment attacks, target creature an opponent controls gets -X/-0 until end of turn, where X is the number of artifacts you control. | Billy Christian

Experimental Augury | Instant | | Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Donato Giancola

Ichor Synthesizer | Creature | Phyrexian Wizard | Whenever you cast a noncreature spell, put an oil counter on Ichor Synthesizer. As long as Ichor Synthesizer has four or more oil counters on it, it gets +2/+0 and can't be blocked. | Sam Wolfe Connelly

Malcator's Watcher | Artifact Creature | Phyrexian Drone | Flying, vigilance When Malcator's Watcher dies, draw a card. | Jason A. Engle

Mercurial Spelldancer | Creature | Phyrexian Rogue | Mercurial Spelldancer can't be blocked. Whenever you cast a noncreature spell, put an oil counter on Mercurial Spelldancer. Whenever Mercurial Spelldancer deals combat damage to a player, you may remove two oil counters from it. If you do, when you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy. | Marcela Bolívar

Prologue to Phyresis | Instant | | Each opponent gets a poison counter. Draw a card. | Simon Dominic

Serum Snare | Instant | | Return target nonland permanent to its owner's hand. If that permanent had mana value 3 or less, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Lauren K. Cannon

Thrummingbird | Creature | Phyrexian Bird Horror | Flying Whenever Thrummingbird deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | José Parodi

Venser, Corpse Puppet | Legendary Creature | Phyrexian Zombie Wizard | Lifelink, toxic 1 Whenever you proliferate, choose one — • If you don't control a creature named The Hollow Sentinel, create The Hollow Sentinel, a legendary 3/3 colorless Phyrexian Golem artifact creature token. • Target artifact creature you control gains flying and lifelink until end of turn. | Igor Kieryluk

Voidwing Hybrid | Creature | Phyrexian Bat | Flying Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When you proliferate, return Voidwing Hybrid from your graveyard to your hand. | Abz J Harding