Use this Stratagem in any phase, when a TYRANID WARRIORS or TYRANID PRIME unit from your army is selected as the target of an attack. Until the end of the phase, each time an attack is allocated to a model in that unit, subtract 1 from the Damage characteristic of that attack (to a minimum of 1). If that unit contains 5 or fewer models, this Stratagem costs 1CP; otherwise, it costs 2CP.