Talk:Galaxy-Threatening Invasion Full Power Boujack (Galactic Warrior)/@comment-34024023-20180418174638/@comment-31555655-20180420203548

Could always do quests that drop incredible gems, there should be a few elder kais in that treasure shop. Normally in the high hundreds though. (I have 3 elder kais left costing 300 incredible gems a pop, can't remember the cost of the ones I already grabbed though.)

Certain banners will reward you with x2 Elder Kais per multi-summon. Other banners occasionally hand them out.