Prone (Condition)

Notes

A creature who is knocked Prone does not skip their next turn, they will simply use their movement to get back up.
- However if a creature gets knocked Prone during their turn, their turn will automatically end and they will not get back up until the start of their next.
Knocking an enemy Prone and reducing their movement speed below 50% will not automatically skip their next turn. An enemy uses 50% of its available movement to stand up; not 50% of its base movement speed.
Some creatures are immune to the Prone condition, including those without a physical body (such as Shadows and Wraiths).
The spell Tasha’s Hideous Laughter causes a target to suffer from Hideous Laughter, which has the effect of Prone, but isn’t technically considered as such.
Being knocked prone instantly ends Concentration

Sources of Prone

Indefinite duration

The following sources of Prone inflict the condition indefinitely. It can still be removed if the affected creature spends movement speed to get up. However, if the creature is unable to move (for example with Maimed, Frightened, or Ensnared), it will remain prone indefinitely.

Two turn duration

Two turns is the typical duration for a Prone effect. Since the duration of Prone ticks down at the start of the affected creature's turn, a 2 turn duration is effectively 1 round. The exact behaviour is as follows:

At the start of the affected creature's turn, the remaining duration ticks down to 1 turn.
If the affected creature can spend movement speed, then it will do so and stand up.
If it can't, it will remain prone and skip its turn. In this case, at the start of the following turn, the Prone duration will run out and the creature will stand up for free.

The following sources have a duration of 2 turns:

One turn duration

The following sources of Prone only inflict it for 1 turn. Since the duration of Prone ticks down at the start of an affected creature's turn, the condition will end before it has to expend movement speed to get up. As a result, these sources of Prone are significantly less effective than the others.

Bugs

Creatures knocked Prone by Reverberation occasionally do skip their next turn unlike other Sources of Prone.

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