Lord Nightshade is a level 3 Death Boss that can be found inside Stormdrain Tower in Haunted Cave, Wizard City. Lord Nightshade does not cheat.
Both temporary and permanent mounts are dropped here.
Poor Nightshade has some rough holidays. He is the easiest boss to defeat in hopes of holiday gear and housing. He drops the permanent Stormrider Hare mount but only during Easter festivities to wizards under level 20.