Brimaz, Blight of Oreskos is a mythic Legendary Creature — Phyrexian Cat card from March of the Machine Commander (MOC), collector number 89. Current market price: $2.27 (foil $2.86), 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.