Use this Stratagem in your Shooting phase, when a HIVE TENDRIL unit from your army is selected to shoot.

Until the end of the phase, add 6" to the Range characteristic and add 1 to the Strength characteristic of fleshborer and fleshborer hive weapons models in that unit are equipped with. If that unit has 16 or more models or has the MONSTER keyword, this Stratagem costs 2CP; otherwise, it costs 1CP.