Wyrmtooth Rounds

Kelermorph model only. Once per battle, in your Shooting phase, after this unit has shot, select one enemy unit (excluding Vehicles) hit by one or more of those attacks. Until the end of the battle, that enemy unit is poisoned. At the start of each Command phase, roll one D6 for each poisoned unit on the battlefield: on a 4+, that unit suffers D3 mortal wounds.