For the passive feature, see Tenacity (passive feature).
Tenacity is a weapon action available to characters proficient in and wielding a flail, morningstar, greatclub, or maul in their main hand.
Description
When you miss an attack, deal 
damage equal to your Strength modifier anyway (minimum of 1).
Properties
- Cost
Reaction- Damage
How to learn
Granted by wielding the following weapon types with proficiency:
Notes
- Tenacity cannot be used to trigger a weapon action if the actual attack missed.