Rise of Tiamat
Ancient Brass Dragon
Ileuthra is an ancient brass dragon who travels the planes in search of knowledge and ever more challenging games. Legend has it that he resides with Oghma, god of knowledge, but the dragon is cagey on that point.
Seeing good and bad in equal measure among the lesser races, Ileuthra recognizes that helping the humanoids is less a case of deciding whether they are worthy of aid, and more about deciding whether these adventurer ambassadors can be trusted to properly lead the factions.