Kalin Shrine
Find Seraph, and ask him to hand over the Antidote Formula.
I have run Kalin Shrine 4 or 5 times now with this quest and the only time Seraph has appeared was to open the door to the last boss area then he dies and despawns. You can not interact with his during this. I looked for him before this point and after and i have not been able to find his.
What am i missing?