In Tasha’s Cauldron of Everything there are 2 so called half-feats Fey Touched and Shadow Touched, which grant an ability score improvement from Intelligence, Wisdom, or Charisma, one spell and one 1st-level spell of your choice from 2 schools of magic. Divination or enchantment school of magic for Fey Touched and illusion or necromancy for Shadow Touched.
Is there a reason why there are no "… Touched" half-feats for the other schools of magic? Would it be unbalanced or game breaking to create "… Touched" half-feats with a combination of 2 schools from abjuration, conjuration, evocation and transmuation?
Best Answer
I think the primary answer to this is that these feats are meant to be thematic for specific realms adjacent to the material plane, and the schools of magic chosen are chosen because they relate to fey and shadow rather than for any specific balance purpose. I don't see any reason any pair of 1st level spells in the game would be unbalancing -- so from that perspective there's no particular reason you couldn't generate a similar feat that lets you chose from, say, evocation and abjuration.
However, I think there is possibly a good reason not to do that. The four schools of magic that are available via Touched feats are probably the ones that are least popular with the average player, and I don't think that's coincidental. Evocation and Abjuration are already the most commonly used schools for most casters, since between them you essentially have all the good attack and defense spells and most of the healing spells; and between Transmutation and Conjuration, you have almost all of the most popular low level utility spells in the game. These feats nudge players toward taking magic that might be less used, where a feat that allows Evocation is probably going to mean a lot more players using it to take cure wounds, burning hands, magic missile, or thunderwave once again. "Pick a 1st level Necromancy or Illusion" is, frankly, just a more interesting decision.