Even without those synergies, Selfless Spirits perfectly respectable
Enchanter's Bane Who says Red can't answer enchantments
Don't forget that you can mill yourself too, letting you use Brain Freeze to fuel graveyard-based strategies or self-mill win conditions
while other sets tie into the broader Magic universe narratively, Final Fantasy falls into the separate Universes Beyond camp
The triggered ability deals damage to the creatures controller even if the creature isnt dealt damage, perhaps because it has left the battlefield or because the damage was prevented
(To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there.) The value of X is determined only once, as Tromell's last ability resolves