Grease is a surface. This flammable surface threatens to knock characters 
as they pass over.
Description
Difficult terrain - movement speed is halved and creatures may fall Prone. Flammable.
Properties
Condition: Prone
- Can't move or take
Actions, 
Bonus actions, or 
Reactions, and has 
Disadvantage on 
Strength and Dexterity saving throws. - Attacks against a Prone creature have
Advantage if they're made within 
3 m / 10 ft of the creature. - A Prone creature must spend half its Movement Speed to stand up.
- A character with the Athlete feat spends only 1.5 m / 5 ft of Movement Speed to stand up.
- A character with the Athlete feat spends only
Creation
This area can be created by the following:
Items:
Spells and actions:
Interactions
- Ignited in a small explosion when exposed to a fire source, leaving behind a fire surface.
Notes
- Created by the movement trails and/or abilities of Grease Elementals, Grease Mephits, and Greaseballs.