Which are the magic system of YGGDRASIL? Acording to Magic Caster link from the Overlord wiki:


  All tier spells in YGGDRASIL could be categorized in four great systems of magic, each one with some exclusive spells and characteristics; at the same way, magic casters are categorized by the system of magic that they use. Magic role players gain access to this systems through specific job classes like:
  (...)


That means that magic casters are one of the four magic systems in YGGDRASIL. I'm looking for the another three... Which are?  

I've seen the first, second and now seeing the third season of the anime, but I don't have any problem if you need to make a spoiler of the novel or manga.
No spoilers, perhaps I even misunderstood the question, but here are the 4 types:


Arcane: these are simply elemental magic like Lightning and such
Divine: these are healing type magic that can be used to heal themselves or their allies
Spiritual: these contain abstract magic
Alternative: as the name implies, these are every other magic