Every way to get Fossa: 2 quests, the Black Cloud Merchants, 3 chests, 2 achievements, 8 Ascension Trials and 3 monsters.
Episode quest
Special, Pets
Opened from this chest
Achievement
Ascension Trial, Easy
Ascension Trial, Normal
Ascension Trial, Hard
Ascension Trial, Extreme
Monster drop, level 24, Altgard
Monster drop, level 25, Verteron
Monster drop, level 34, Altgard