Tree Singing spell

(Rule)
Description: Cast on 8+, Augment spell which targets a forest within 18". If there are no units within the forest, it moves up to d6+1" in a direction of your choice. If at least one friendly or enemy unit is within the forest it does not move, instead: Choose a single enemy partially within the forest, it suffers 2d6 S4 hits. Boost to target all forests within 12", cast on 16+