In Commander, its incredibly powerful in the command zone or the 99
Sure, it costs four instead of three, and you must discard the card before drawing two, but generally speaking, I think Chemisters Insight is worth more than draw two-and-a-half, and thats pretty comparable to Glimmer of Genius
Muster the Departed's last ability will trigger only once during your end step, no matter how many creatures died under your control this turn
If this card is in your early hand, you can also use the dredge mechanic to quickly build your mana pool and ensure you don't miss crucial land drops
By synergizing with what white does best, playing auras, enchantments, and equipment, activating this trios draw effects are a cakewalk
Even if we ignore the infinite mana win condition, Oona, Queen of the Fae is still very much worth playing