Lord Soth.I'm Dungeon Master and I declare him Lich.
Wikipedia said:Lord Soth, the Knight of the Black Rose, is a fictional character in the fantasy realms of Dragonlance and later Ravenloft. He is a death knight and fallen Knight of Solamnia from the world of Krynn.
According to Tracy Hickman, he needed a powerful character for the Heroes of the Lance to fight at the High Clerist's Tower, and Lord Soth suddenly came into his mind with a complete history and personality. The popularity of Lord Soth as a character has defined what a death knight means to the writers of the Dungeons & Dragons game over the years.[1] Soth was also named as one of the greatest villains in D&D history in the final print issue of Dragon.[2]
The image Arakhor posted depicts one of the events of Dragons of Spring Dawning.