Seal of the Ancients

The Seal of the Ancients is a talisman capable of summoning and controlling the Demodragon Kavaxas. Its primary user in the series is Tiger Claw.

The third step of Kavaxas' plan to subjugate the world, was to destroy the seal, making him unable to be controlled by anyone else. However, it was mended by using bubble gum. Michelangelo commanded Kavaxas to open a portal to the netherworld and return to whence he came, and following this, the planned to shatter it into dust and drop the remains into the ocean, to prevent it from ever being used again.