Brimaz, Blight of Oreskos is a mythic Legendary Creature — Phyrexian Cat card from March of the Machine Commander (MOC), collector number 2. Current market price: $0.46 (foil $0.50), TCGplayer market prices via Scryfall.
Whenever you cast a Phyrexian creature or artifact creature spell, incubate X, where X is that spell's mana value. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.) At the beginning of each end step, if a Phyrexian died under your control this turn, proliferate.