The Constrictai Tomb was the prison of the Constrictai tribe. It is hidden within the Mountain of a Million Steps, being accessible from an entrance near the peak. The tomb is lit by several torches along the walls, which are also covered in ancient murals depicting Serpentine legends.
Nya managed to extrapolate the locations of the remaining two Serpentine tombs by deducing a pattern in the placement of the Hypnobrai, Fangpyre, and Anacondrai Tombs. With this knowledge, Wu sent Cole and Zane on a mission to stop Pythor from releasing the Constrictai. When the two ninja arrived, the tomb appeared deserted, but some exploration led them to a mural depicting the prophecy of the Great Devourer.
Before Cole and Zane could flee the tomb with this new information, they were ambushed by Skalidor, the Constrictai General. Seizing Cole with his tail, Skalidor explained that Pythor had already released his tribe from the tomb, but he had stayed behind to "send Pythor's regards" to the Ninja when they arrived. After a fierce battle, Zane managed to weaken Skalidor with the Sacred Flute, allowing Cole to deliver a knockout blow with his scythe. After that, the two ninja fled to the Toxic Bogs to help Kai and Jay fight the Venomari.
During the hunt for the Fangblades, the Constrictai Tomb was remodeled and expanded into the Serpentine's underground fortress, becoming the hub for all of the snakes' underground activity. When the Ninja found the fortress, they returned to the Constrictai Tomb, only to find it deserted once again. Luckily, Cole inadvertently opened the hidden entrance to the fortress by touching a crude drawing of the Ninja on the wall.