Collision
When a creature is thrown from one edge of the battlefield to the other. When a monk's momentous blow flings an enemy across the room. When a barbarian grabs and chucks a wee goblin into the stratosphere and through the walls of a tavern. Or when the magic of a mighty thunderwave bellows a sorcerer's foes away from them, smashing them into a wall of boxes.
Colliding with Objects
When a creature is pushed away from you and moves into (or is unable to move into) a space that has an object of its size or larger (or 1 size smaller), it collides with the object. It takes Collision Damage / Bludgeoning Damage equal to 1d4 per 5 feet the target is pushed or shoved away.
Example Damage
| Damage | Pushing Effect |
|---|---|
| 2d4 | Thunderwave |
| 1d4 | Shove Action |
| 3d4 | Gust of Wind |
| 3d4 | Pushing Attack |
| 3d4 | Open Hand Technique |
Other Collision Damage Calculation:
- 1d6 per 10 feet.
- 1d4 - 5, 1d6 - 10, 1d8 - 15, 1d10 - 20, 1d12 - 25, 1d4 + 1d12 - 30 (and so on in that order)
Colliding with Creatures
When a creature is pushed away and moves into (or is unable to move into) a space that has a creature of its size (or 1 size smaller or larger), the creature who is about to be collided with must make a Strength or Dexterity saving throw with a DC of 10 + 1 for every 5 feet the creature is being pushed / shoved / thrown etc.
On a failed saving throw, the creature is collided with, and takes half the amount of damage the collider would take from the colliding damage (rounded down, while the collider takes rounded up). The collider also stops moving and lands in an unoccupied space within 5 feet of it (preferably in a space from the direction it was thrown). Both creatures also are knocked prone.
On a successful Dexterity saving throw, the creature continues moving (and could potentially collide with another creature).
On a successful Strength saving throw, the collider creature stops moving and takes the total collision damage, while the creature who was about to be collided with stops its movement and it drops in a space within 5 feet of it. Alternatively, the creature could also use its reaction to allow the creature to continue to be thrown, then throwing it in a direction of the creature's choice, redirecting it.