In the vampire lore of the Czech Republic there is a vampiric REVENANT called an ogoljen (“stripped bare”). When it is out hunting for humans to attack for their blood, it keeps dirt from its gravesite in its navel. An ogoljen cannot be destroyed, but it can be captured and buried at a crossroads to keep it from ever rising again.

Source: Grimm, Teutonic Mythology, 1266; Haining, Dictionary of Vampires, 191; Kessler, Demons of the Night, 13-21; Volta, The Vampire, 144