ToME: the Tales of Maj'Eyal

I know this is a really stupid question, but I was playing earlier and I had a apopup saying DarkGod gifted me the DLCs for Tome4. I am a new player, only been playing for a couple weeks. How do I access this content? Thank you in advance.

-Brian

Hello all! I am a relatively new player. I just got a notification in the game saying that DarkGod slipped Embers of Rage in my inventory, but I have no idea how to access it or what to do. Can anybody explain what I should do? Thank you in advance!