The Path of the Pits is one of two ways into the inner depths of Firetop Mountain.
The two paths seem to have been established with Zagor's authority after the warlock's first resurrection. Overseen by the Pitmaster, the entrance to the Path of the Pits was via the left-hand tunnel stretching from a large torch-lit cavern filled with crystals. 
While the Path of the Puzzles taxed the entrant's mind, the Path of the Pits was a trial by combat. It involved the player descending into two pits - one containing a Chaos Slime Beast and the other a Metallix. The player would have to fight these two creatures to the death.
The Better Option?Edit
The Path of the Pits is actually in incorrect one to take. The player will need very high stats to stand a good chance of surviving this path, largely due to the fight against the Chaos Slime Beast. However, even if the player should emerge victorious, he will miss a vital piece of information useful to him in the final confrontation with Zagor.