There are a lot of ninja mods out there.
This is ninja mod 1.0 by maxde6.
Here are the weapons
Golden Katana Not durrable but strong
Diamond Katana Very durrable and strong
Katana-Iron Katana durrable and sort of strong
Wood Katana sort of durrable weak
Stone Katana a little better than wooden
Emerald Katana Second strongest very durrable
The Blade of Fire Great durrability 14 attack damage ecxept no fire :(
Sorry my spelling isnt great today.
Warning:This is very early beta and most things dont work.
and i added bamboo
Planned for next update
flaming ninja star
Thats about it for now