Scorpion-like arachnoids are plentiful on Pandora. The venom of one species, the kali’weya, is used in the Na’vi’s Dream Hunt ceremony. During this ritual, Na'vi elders evoke a sting by placing the arachnoid against the skin of the prospective warrior's neck. Their venom is psychoactive, and may induce hallucinations when used in conjunction with an alkaloid contained in an indigenous worm.