Tremor
This spell is a part of the Grounding spell chain and can be found in the Grounding rune stone.
This is a well known geomancy spell that causes the ground to shudder violently underneath the feat of everyone in the radius around the user. This causes a disorientation that causes everyone in the radius, ally and enemy, to fall down costing a whole movement to get back up. The fall causes 2d12 physical magic damage.