Unctus's Retrofitter

Unctus's Retrofitter

Creature - Phyrexian Artificer | Power/Toughness: 2 / 3 (CMC 3)
Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
When Unctus's Retrofitter enters the battlefield, up to one target artifact you control becomes an artifact creature with base power and toughness 4/4 for as long as Unctus's Retrofitter remains on the battlefield.