Use this Stratagem in the Fight phase, when a HIVE TENDRIL CHARACTER model from your army that has not already been selected to fight this phase is destroyed, instead of using any rules that are triggered when that model is destroyed (e.g. the Death Throes ability). Do not remove that model from play - it can fight after the attacking model’s unit has finished making attacks. When making those attacks, if the destroyed model’s characteristics can change as they suffer damage, that model is considered to have its full wounds remaining for the purpose of determining what those characteristics are. After resolving the destroyed model’s attacks, it is then removed.