mtg draw card opponent loses life Barbed Servitor (398) – Axion Now it starts at 1 Unfortunately I am genuinely addicted

A lot of the times, you will actually be sacrificing your creatures to trigger specific effects

Sorcery Tutor (CTRL to add secondary) Maybeboard Bloodchief Ascension At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment

At a casual or precon-level table, absolutely

Did I miss any that you think should be here, or on the flip side, did I list an undeserving shifter

It's actually pretty simple

Companions did not take up a slot of the 99, thus it would have been an auto-include in any deck that would have been able to run it, though this was spotted by Wizards before the release of Ikoria and hence received a day 0 ban