Each lore has a unique Cataclysm, every with its personal super-powered results, as detailed on the Total War weblog: Lore of Beasts While a lore is empowered, any spells solid will cost up that lore’s Cataclysm spell, and also you’ll have a restricted window of time to solid it as soon as it’s charged. While in battle, a unique lore of magic will be ‘ascendant’ at any given time.
Magic reserves are all the time infinite in these areas, and the one restraint on magic use will be how rapidly you’re in a position to attract reserve magic into your energetic pool.
All bets are off, although, when you enterprise into the Chaos Realms, the place the winds of magic are apparently blowing at gale power just about on a regular basis.