Terrain Difficulty (Grisaire Supplement)
The difficulty of traversing terrain in battle can be a bit too simple sometimes. So, here are some added modifiers to make things a bit more different on the ground. They are divided into different conditions that all classify as "difficult terrain," but have added effects based on degrees that compound. Feel free to also mix effects if terrains feel like they fit under more than one category!
- Slippery
Slippery difficult terrain is typically very low on the friction index. However, the degree to how slick something is can affect how fast you can move or how careful you must be to avoid falling prone. This encompasses terrain that is covered by ice, oil, and anything weird and slippery you can think of, like Teflon :D
| Level | Effect |
|---|---|
| 1 | You must expend an additional 5 feet for every 5 feet you move. |
| 2 | You must expend an additional 5 feet for every 5 feet you move. If you try to dash on this terrain, you must pass a DC 15 Dexterity saving throw or be knocked prone where you stand. |
| 3 | You cannot move more than 5 feet with your move action without falling prone. If you try to dash on this terrain, you must pass a DC 20 Dexterity saving throw or be knocked prone where you stand. |
- Obstructive
Obstructive difficult terrain has added elements that make it difficult to traverse, be it an entangle spell or heavy snow and dense mud. These effects have the chance of restraining movement entirely as they grow in degree of obstruction.
| Level | Effect |
|---|---|
| 1 | You must expend an additional 5 feet for every 5 feet you move. |
| 2 | You must expend an additional 5 feet for every 5 feet you move. If you try to dash on this terrain, you must pass a DC 15 Strength saving throw or be restrained until the start of your next turn. |
| 3 | You must expend an additional 10 feet for every 5 feet you move. You cannot dash in this terrain. |
- Damaged
Damaged difficult terrain is terrain that has been broken so that it is hazardous. Unlike obstructed difficult terrain, there aren't really added elements. An example of this is earth that has been rendered cracked and jagged by a quake, or a glacier that exposes its icy edges after cracking. Movement through this terrain poses a hazard as it is very uneven and can even cause damage.
| Level | Effect |
|---|---|
| 1 | You must expend an additional 5 feet for every 5 feet you move. |
| 2 | You must expend an additional 5 feet for every 5 feet you move. If you try to dash on this terrain, you must pass a DC 15 Strength saving throw or have your movement speed halved until the end of your next turn. |
| 3 | You must expend an additional 5 feet for every 5 feet you move. If you try to dash on this terrain, you take 1 point of nonmagical slashing damage for every 5 feet you move. The damage may be magical if the damaged terrain was caused by a magical effect. |
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