Phyrexia: All Will Be One

Incisor Glider | Artifact Creature | Phyrexian Construct | Flying Corrupted — Whenever Incisor Glider attacks, if an opponent has three or more poison counters, creatures you control get +1/+1 until end of turn. | Joe Slucher

Infested Fleshcutter | Artifact | Equipment | Equipped creature gets +2/+0. Whenever equipped creature attacks, create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This creature can't block." (Players dealt combat damage by it also get a poison counter.) Equip {2}{W} | José Parodi

Mandible Justiciar | Artifact Creature | Phyrexian Cleric | Lifelink Whenever another artifact enters the battlefield under your control, Mandible Justiciar gets +1/+1 until end of turn. | Mike Franchina

Norn's Wellspring | Artifact | | Whenever a creature you control dies, scry 1 and put an oil counter on Norn's Wellspring. {1}, {T}, Remove two oil counters from Norn's Wellspring: Draw a card. | Jonas De Ro

Veil of Assimilation | Artifact | | Whenever Veil of Assimilation or another artifact enters the battlefield under your control, target creature you control gets +1/+1 and gains vigilance until end of turn. | Wayne Wu