You try to put your opponent on the back foot with a furious attack.

The target gets a health save.
When you use this technique on a Heavy Attack, you may spend 1 more stamina to increase the save DC by 5.

Fail:
Until the end of its next turn, all the target’s rolls to hit have disadvantage.

Pass:
The target’s next roll to hit has disadvantage.
If this penalty is not used before the end of its next turn, it is lost.

You cannot use other techniques with this attack.