The Eclipse King, and his son Angli - The Redscale Misadventure Dnd Campaign

The BBEG of The Redscale Misadventure Dnd Campaign's Act 2. Also drew his song, since he was originally intended to be the BBEG of the party in Act 1, but they became his allies.
The Eclipse King's arsenal and powers are themed after The Moon and The Sun, and he can switch through different phases to gain different powers. The party survived but barely, as they were stuck on the moon, but since they had a decanter of endless water and water-breathing potions. It bought them enough time to find a way back.