Kormrok creates Empowered Explosive Runes on the ground. If these runes aren't triggered within 15 sec they will explode, inflicting Fire damage to all enemies.
Each time a rune is triggered it will move in the direction the triggering player is facing. Empowered Explosive Runes are only completely consumed when they are the last rune in play or their movement would cause them to move on top of an existing rune.