Power Word Stun
Casting Time
Range
Target
One creature
Components:
Duration:
Instantaneous
Saving Throw
Constitution (special)
You utter a powerful word that stuns a target with 150 hit points or less. At the end of the target’s turn, it makes a Constitution saving throw to end the effect. If the target has more than 150 hit points, it is instead rattled until the end of its next turn.
Rare Versions
Kreven’s Maiming Power Word Stun. When a target succeeds on its saving throw , its movement is halved and it is either blinded or deafened (your choice) until the end of its next turn.
Source