BoneLab Haki is based off a show called One Piece, it's essentially a way to harden your skin making your punches more powerful and giving you better durability.
There's also Conquerors Haki, basically it knockes out any weak person within a large radius.
Finally Observation Haki allows you to see a little into the future and what your opponent will do, I could possibly add this, but I'd be very limited.
So far I've made Conquerors Haki semi-functional, but with the recent updates it's mostly broken... so I only have an older gif of how it'll work:
Very accurate representation of my house, trust, it's 1:1. Not really sure where I'm going with this map, I started it as a way to improve my mapping skills and I think I've been doing good so far!
This map however, I do have the name for, this one will setup a story that'll be included in future maps!