Comet Balls were a very popular brand of Kohlii Ball sold in Po-Koro by Ahkmou, a Po-Matoran servant of Makuta's, in Po-Koro. However, unbeknownst to all but Ahkmou and Teridax, the balls were infected with Makuta's darkness by Kraata, causing every Po-Matoran who bought and used one to fall ill. Almost all of Po-Koro fell to this plague, which Turaga Onewa called 'the Madness'.