
Ezuri, Stalker of Spheres | Legendary Creature | Phyrexian Elf Warrior | When Ezuri, Stalker of Spheres enters the battlefield, you may pay {3}. If you do, proliferate twice.
Whenever you proliferate, draw a card. | Fariba Khamseh
4.0 LSV

Tainted Observer | Creature | Phyrexian Bird | Flying
Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Whenever another creature enters the battlefield under your control, you may pay {2}. If you do, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Johann Bodin
3.5 LSV

Atraxa, Grand Unifier | Legendary Creature | Phyrexian Angel | Flying, vigilance, deathtouch, lifelink
When Atraxa, Grand Unifier enters the battlefield, reveal the top ten cards of your library. For each card type, you may put a card of that type from among the revealed cards into your hand. Put the rest on the bottom of your library in a random order. (Artifact, battle, creature, enchantment, instant, land, planeswalker, and sorcery are card types.) | Marta Nael
4.0 LSV