Maxperson
Morkus from Orkus
Heh. That is indeed a stretch! Where I think your stretch snaps is that all of the forces you mention are energy types, except for poison and spells don't require energy types. And even energy types that are the same don't require being in the same school. See Fireball(evocation) and Flaming Sphere(conjuration).The only explanation I can come up with (bear with me, because this is a massive stretch) is:
Acid, cold, fire, force, lightning, thunder, and I suppose radiant damage all attack the body from the outside, while necrotic and poison damage attack the body from the inside. Psychic also attacks from the inside, but it attack the mind, rather than the body.
That’s all I’ve got. Did you enjoy that nougaty stretch?
So even if you do say that it attacks from the inside like necrotic damage, it still can and should be evocation or conjuration.
