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.
Brimaz's last ability will check as the end step starts to see if a Phyrexian died under your control this turn. If one did not, the ability won't trigger at all.
14 Apr 2023
If you cast a Phyrexian artifact creature spell, Brimaz's first ability will trigger only once.