Location: Learned from the Big Dragon guy in waterfall where Talana (you wish) feels a strong presence. Enter there and three hungry hungry stones will prompt you to get them some items. Do the main quest of the three stones/trees and you'll open your path to the dragon guy.
Spell: Note from Maxos. Found in your own battle tower throne room.
Shield: Aleroth. To go there you have to do a side quest. Then this means this is not a side quest after all. So are the game developers freaking blind or what? It is a main quest. So yeah, that quest is about collecting nine zeppelin parts across the fjord map and handing them all over to Page's dirty face. Then you go to Aleroth, meet with Zandalor, solve guy's problem and be done with it.
Sigil: After Damian stikes to Broken Valley, head over there and go rescue the miner guys. You'll be given a key to enter the mines, use it, go deep, meet Baal, tear him apart and you'll get your both (Unique) item randomly generated each load, and your sigil.
How to enter: Speak from the notes of maxos, the spell in Exact location that Dragon guy told you to. Right click. Your set. Have fun.
And check this if you need any other advice.
http://guides.gamepressure.com/divinityiiegodraconis/
