Stunned

Some weapons or attacks are intended to temporarily incapacitate their target. This may be because the attacker wants time for their allies to make an action, or to cover an escape.

Inflicting weapons

MH-X3 grenade

Condition: Stunned

A creature who is stunned cannot take any other action other than attempting to end the condition. The creature must use an action to retry the saving throw that inflicted the condition. Every time the saving throw is retried, the DC goes down by one. No matter what the original save was, stun recovery saving throws are always mental saves.