Mordroc

Mordroc is the evil wizard in Dragon's Lair 2: Time Warp. He also appears in Dragon's Lair 3D. He kidnaps Princess Daphne to force her into marriage and enslave her with the Death Ring.

Dragon's Lair II: Time Warp
Mordroc appears in some levels of the game to taunt Dirk the Daring and avenge Singe's death, as in the Prehistoric era and in Ancient Egypt, appearing as a mummy after Dirk thought it was Daphne.

In the final level of the game, Mordroc puts the Death Ring on Daphne's finger, which transforms her into a monster, but she is saved when Dirk gets the ring off her and throws it to Mordroc. He turns into a bloated monster who gets killed soon afterward by Dirk's sword.

Dragon's Lair III: The Curse of Mordread
Mordroc doesn't appear. However, he was mentioned by his twin sister Mordread who wants revenge him.

Dragon's Lair 3D
According to this reboot game, Mordroc is the main villain, and Singe is only his sidekick. He was imprisoned long ago, after being defeated by magic arrows, and his minions took the Dragon Essences for themselves. It was him who ordered Singe kidnap Daphne. Mordroc also impersonated Daphne, persuading Dirk to get the Dragon Essences back. At the end of the game, he reveals his role but Dirk defeats him again with the magic arrows. Mordroc then turns into a wyvern.