Larian Studios Forums Divinity 2 - Ego Draconis (English) Divinity 2 - Ego Draconis Some Major Questions For Me

There will be additional dragon skills in FoV (and presumably that section of DKS).

Summon Demon has a max level of 15, so you should be able to train it twice more. Did you talk to Sassan after completing the upgrade quest? Did you double check the trainer's skill list and your current level cap?