After you have completed the "Midnight Sun" quest in Zafaria, talk to Pacal Redmask in Azteca. He will start you on the quest "King of Fang and Claw" to find Tezcat Threestar in Cenote and return him to Zocalo. Tezcat will then offer you quests for the Astral spells and you must return to him to advance to the next quest.
hi i also am having the same issue, i completed aztecas star and sun quest and reached lvl 88, and did not receive neither a notification nor when i got see pacal redmask there is no quest. I am in alto alto and am wondering if i missed anything?