In all his undead glory, Soth stands 6'5" or taller. He wears a full suit of Solamnic plate mail that is of ancient design. Damage from many battles mars the delicate ornamentation on his armor, obscuring its intricate carvings of kingfishers and roses, leaving only a charred black rose on the breastplate, which had become Soth's symbol. A long purple cloak hangs heavily on his shoulder, draped behind him almost to his knees. A tassel of long black hair tops his helm, as worn and ancient as the rest of his armor. A sword black with the blood of countless victims hangs sheathed on his hip. Of the death knight himself, only two flaming dots red as blood shine from the eye slits on the helm. His voice seems an echo from the depth of a bottomless cavern. Like all death knights, there is always an aura of freezing unearthly cold around Soth, the demeanor so terrifying that even kender have been known to be frightened. When traveling, Soth is usually mounted on a nightmare, a demonic steed with ebony skin and flaming feet.

Although evil and filled with an intense hatred for all living creatures, most of the time Soth retains a semblance of the pride he held as a Solamnic knight, and fights honorably. He will never ambush an opponent from behind, nor does he strike before his enemy can ready his weapon. Aside from these facts, however, Soth is a terrible enemy. An undead abomination, Soth has inhuman strength, which is further enhanced by his skill with the sword; something that he learned as a former Knight of the Rose. Soth also can cast various type of spells, including huge fireballs, magical words which stun or kill enemies, ice walls, cone of cold, etc. With a single word, Soth can snuff the life out of (thus Power Word: Kill) a red dragon, or shatter the great city gate of Palanthas, which was formerly known as the "Unconquered City."