Mine, Stun

Unlike grenades, which explode shortly after being thrown, mines are designed to detonate once a specific trigger occurs. As an action, you can set a mine in an unoccupied space within 5 feet of you. When you set a mine, determine the circumstances under which the mine will detonate. For example, you can set the mine to detonate on a timer, when a creature enters the mine’s space, or under other specific circumstances (such as when a door opens or a vehicle activates). You can also rig the mine to detonate remotely using a remote detonator.

When detonated, a mine functions identically to the grenade it emulates.

Each creature within 10 feet of the mine when it explodes makes a Constitution saving throw. On a failed save, the target takes 1d6 thunder damage and is rattled until the end of its next turn. A creature that fails the saving throw by 5 or more is stunned instead of rattled until the end of its next turn. On a success, the target takes half as much damage and isn’t rattled.