Dagon'hai Monk

After finishing the Hunt for Surok mini-game/quest, you can reach these by entering the chaos tunnels via the dagon'hai entrance (east of varrock). Once in, use the north portals until you reach the crypt rats, head to the west end of this tunnel and use the portal, if you're done the mini-quest, you should be at Zamorak Warriors and Dagon'hai Monks.

Habitat(s)
Chaos Tunnels