Karnath's Lair is the sixth stage from Battletoads. The stage takes place deep in an underground cave inhabited by giant serpents.
Stage 6 has four sections that contain different-colored backgrounds as well as spikes and floors. The first section serves mostly as an introduction, with no obstacles. The player must jump from snake to snake at the right time to reach the next area. If the player falls off from a snake he must wait for the next one to show up.
The second section has gray floors and a brighter background with different tiles. There are also spikes this time, meaning jumping must be done with great timing. The third section has more modifications: there are more spikes and no floor, so the player must be on a snake at all times. The spikes are made more difficult to get across, so jumping will need to be perfectly accurate. The final section, section four, has a series of elevated floors that the player can jump on, along with the usual hazards.
A secret warp zone can be found in the second area. To reach it, the player must dash diagonally across the all the spikes to reach the ground area before the warp disappears. Reaching it will take the player straight to the eighth stage, Intruder Excluder.