Spider's Lair

Once per battle, at the end of your Movement phase, if this unit is wholly within an Area Terrain feature and contains a Warp Spider Exarch model, you can select for that terrain feature to be webbed. If you do so, until the start of your next turn: Enemy units treat that terrain feature as if it had the Difficult Ground terrain trait. Each time an enemy unit ends any type of move (excluding pile-in or consolidation moves) within that terrain fature, roll one D6: on a 2+, that enemy unit suffers D3 mortal wounds.