The Halloween invasion is a Syndicate attack on Whateley Academy during the Halloween party in 2006. It was initially planned by Rev. Englund to be a limited attempt to kill The Kellith. According to Syndicate leader Dominus it was originally to be led by Nimbus, but control over the operation unilaterally seized by Deathlist in violation of direct orders and transferred to Chessmaster, who used it to attempt to assassinate most of Team Kimba, as part of what appears to be his rivalry with Mrs. Potter. The Chessmaster used his private army of Chessmen to avoid spilling his plan to the rest of the Syndicate forces.