ApplyLegBuff tree structured. scripts to edit: ApplyBuff to apply the buff (enum) to the leg, and the LegScript to put in the functionality of the venom and web buffs.
(web buff should be a set health amount shield, and venom should apply dot when hitting people)

To test, uncheck the enable box for the behavior tree under BossTest > MainBody

Check the Impale script I put in where you should implement the damage. It should only be calculated for 1 frame which makes sense IMO.