Halo

Halo is a baby black dragon, presumably acid-type

In the Campaign
Halo was discovered by Langen deep inside Mattenome Mountain, during the Adventuring Party's escort mission up the mountain. Since, Halo has remained with Langen and aided him in battle, armed with a strong acid attack.

During a visit to the Magical Shop in Khazam, Halo was traded by Langen for several magical items.