Behaviors Additions /behaviors/monster/boss/dollboss/*** /behaviors/nodes/dollboss.nodes 1. spawnHands 2. updateHands 3. dollbossBobIdle 4. dollbossBobApproach 5. dollbossSwoop /behavior/nodes/modules.nodes 1. dollboss behavior modules 2. staffcombat /behaviors/nodes/npc.nodes 1. hasStaffPrimary 2. hasStaffSheathed /behaviors/npc/combat/meleecombat.behavior /behaviors/npc/combat/rangedcombat.behavior /behaviors/npc/combat/staffcombat.behavior /behaviors/npc/combat.behavior Log Code: Error: [10:02:56.402] [Error] Application: exception thrown, shutting down: (BadVariantCast) I have no idea what that even means, and the log doesn't tell me where that error is being called. If attached a git with the behaviors and a log. Hopefully this is enough information to pinpoint this problem. If not just ask for more. @Healthire On a related note, we could use some improved error logging for behaviors. It tells us theirs an error and even gives us a stack trace. But it doesn't tell us where that error generated.