You are able to learn and train in more esoteric forms of magic such as: Ayleid magic, Necromancy, Shadow magic, Tonal magic, the Thu'um, and any magic referenced in any piece of lore (canon or not) (although the Thu'um is extremely hard and complicated to learn, and you will never be on the level of a dragonborn). (With enough time you are able to do anything with this power)
Project V17/Powers/Shardless/Magic and Mystic Power Upgrades/Esoteric Magick (TES)
From Worm CYOA Wiki
Esoteric Magick (TES)
Cost: 10 SP (Dovahkiin (TES))
Cost: 5 SP (Dovahkiin (TES))
Required: Magicka Casting (TES)
Dwemer Technology
Your ability to use Magitech now includes the ability to create the fabled technology of the Dwemer. This does include the Numidium, try not to zero-sum or make any Dragon Breaks.