Ki-Empowered Strikes is a Monk passive feature that allows unarmed attacks to count as magical while attacking enemies possessing 
Resistance and 
Immunity to non-magical damage. In effect, unarmed attacks will ignore resistance and immunity to 
Slashing, 
Piercing, 
Bludgeoning non magical damage of the corresponding type .
Description
Your unarmed attacks count as magical for the purpose of overcoming enemies' Resistance and Immunity to non-magical damage.
How to learn
Classes:
- Class level 6: Monk