Shiny black stones
The weaponmakers of the tribe noticed that this special shiny black stone called obsidian is much better than regular flint: when broken, it is sharper than anything they've ever seen and it can cut through anything. What if we tried to make deadly weapons out of it? Now the stones are usually small, but one craftpig had this idea: what if we inserted several of them into wooden poles to create a longer continuous blade in the shape that we want?
- You do not need to have a specific amount of obsidian, nor do you need to have claimed land which contains obsidian for the technology to become available.