Pyre

Throughout the game you will be able to collect talismans by playing through the story or purchasing them from the Slugmarket. Talismans grant bearers special abilities or a boost to their stats. You can upgrade talismans by purchasing Star Dust from the Slugmarket. To unlock this trophy, purchase enough Star Dust to upgrade a particular talisman to level 20.

I’d recommend upgrading the Cur’s Fang as it grants the bearer increased Pyre damage. It will also help you achieve Fear Not the Flame with Jodariel, as long as you have used your vocations wisely.