Quote Originally Posted by Unregistered View Post
I'm not entirely clear on this one either, but if I have to guess? I think you can generate them on command like standard/expert now. The reason I lean in that direction is because the cost to start a Ragnarok raid is 50 AP & 3 of the upper tier core. The emphasis on the extra material cost is because it looks like ragnarok in raid events switch to the idea of create whenever you want if you have the AP and materials, but we'll find out for sure next event.
But again, I don't know for sure.
It's documented in the JP wiki on the Raid encounter page for Disasters: http://xn--hckqz0e9cygq471ahu9b.xn--...83%88%E3%83%AB
難易度EXPERTをクリアすることで、難 度RAGNAROKが新たに出現。
難易度Ragnarok自発には属性に対応した 上位イデアコアが必要
(Fire Ragnarok section) 自発には炎獄型イデア・コアが3つ必 。
Ragnarok becomes available after Expert is cleared.
To spawn the Ragnarok difficulty encounter, upper-tier idea core(s) of the corresponding element are needed.
(Fire Ragnarok section) Spawning requires 3 upper-tier cores.