The Fangpyre Tomb is one of the five Serpentine tombs created to seal the Serpentine away. It is located in a graveyard at the middle of a forest, with the entrance beneath a dead tree that resembles a two-headed snake.
When the Hypnobrai betrayed Lloyd, he sought revenge by releasing another tribe to go to war with them. Using the Map of Dens, he decided to seek out the Fangpyre tribe, and journeyed to the graveyard where their tomb was supposed to be hidden. Although frightened by the eerie surroundings, Lloyd found the entrance and opened the tomb, releasing the Fangpyre. Their general, Fangtom, was more than happy to help bring down the Hypnobrai, but admitted that his tribe would need reinforcements before it could stand a chance against the other Serpentine.
The Serpentine used the Fangpyre Tomb to hide from the Great Devourer after it proved impossible to control. As they gathered with several food supplies in hand, Fangtom and Skales briefly had an argument, only for the Great Devourer to pass by, forcing the Serpentine to flee inside. Later, following the Devourer's death, the cheers of Ninjago's citizens reached the Serpentine inside the tomb.