Corpse Flower

A corpse flower can sprout atop the grave of an evil Necromancer or the remains of powerful Undead.

Unless it is uprooted and burned while it is still a seedling, the corpse flower grows to enormous size over several weeks, then tears itself free of the earth and begins scavenging humanoid corpses from battlefields and graveyards. Using its fibrous tentacles, it stuffs the remains into its body and feeds on carrion to repair itself. The plant has a malevolent bent and despises the living. Although it eats only corpses, it does not mind how fresh they are- and is more than capable of making its own.