Tar shot

You uncork a flask of oil and send the contents flying to a point within 25 ft of you that you can see. If it hits a living object the creature takes (2d4) bludgeoning damage and is coated in oil. Once the oil either reaches its destination or hits an object it falls to the ground leaving a “5x5” puddle of oil. The oil leaves a flammable trail over any ground it covers causing the ground to become difficult terrain. If a created enter the terrain it makes a 15 dexterity saving throw or becomes covered in oil. As an action a creature can clean itself from the oil. When coated in oil any fire damage dealt to the creature ignites the oil causing 5 damage. The oil lasts 1 minute when lit on fire and a created may use an action to rid themselves of the oil. Taking (1d10) fire damage when doing so.