The Dark Step Teacher is a Shop NPC who teaches players the Dark Step fighting style.
Shop:

The Dark Step Teacher teaches Dark Step for $150,000.

• Purchasing Dark Step is permanent, just like all other fighting styles.

• Once unlocked, players can re-equip Dark Step at any time by speaking to the Dark Step Teacher, even after switching to a different fighting style.

Locations:

The Dark Step Teacher can be found in the following locations:

• First Sea – Pirate Village

• Second Sea – Hot and Cold, near the volcano closest to the cold side.

• Third Sea – Inside the Castle on the Sea.

Dark Step Teacher's location at the Pirate Village