Definitions

1. noun

A mythical or legendary leader who rules by cunning and deceit, often in a fantasy or fictional context.

“In the novel, the diabolarch manipulated the king’s advisors to achieve his own sinister goals.”

2. noun

A master of evil or villainous character in a story or tale, especially one with magical powers.

“The protagonist faced off against the diabolarch, a dark sorcerer with the power to control the elements.”