Arcanaloth

Technically classified as fiends, arcanaloths are medium-sized, jackal-headed beings with humanoid bodies. They can use magic to disguise themselves as any humanoid in order to gain trust in negotiations.

Highly intelligent and charismatic, arcanaloths can speak or write any language, making them excellent negotiators for peace or war, depending on who is paying them for their services. Not drawn to paltry coinage, the only currencies that arcanaloths crave are information and power. Though items with strong magics can be used to barter for more information, so those are fine payments, too.