Spike Stones
Long, sharp spikes of solid rock thrust up from the ground in the area. The area becomes difficult terrain and hazardous terrain. A creature that moves on the ground through the area takes 3 piercing damage for every square of that area it moves into.
Heightened (+1) Increase the damage by 1.
Traits
An action with this trait requires a degree of mental concentration and discipline.
Effects with the earth trait either manipulate or conjure earth. Those that manipulate earth have no effect in an area without earth. Creatures with this trait consist primarily of earth or have a connection to magical earth.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.