Target a tile within range, you create a patch of oil up to 5 tiles in radius from that spot. If a creature stands in the oil they become slowed and are slowed until 2 turns after they leave the oil. If the oil is ignited all creatures within take 3d6 damage and must succeed a resilience saving throw or be burning at the severity of the terramancer level of the player who created the oil slick.

In combat: Once per turn · Out of combat: At will