A Golden Monk of the Golden Brotherhood.
Nestled on the edge of Grophtown there stands an odd-looking building with a gold-plated star on the front doors. This is the order of the Golden Brotherhood. Little is known about these strange grophs in golden habits. They are a very ancient brotherhood, but they're forbidden from discussing their beliefs with outsiders.
What is known, however, is that they make their living by selling magical golden coins for six regular coins apiece. Perhaps due to indecisiveness, or maybe some arcane formula, the monks never seem to ask for the same six coins.
The special golden coins can be used to train your groph, or six of them (three of each type- the Banded Gold Coin and the Golden Star Coin) can be exchanged for a Radiant Coin. You can also exchange your regular coins for twice as many Half Coins here.