Tendon is collected by killing and harvesting Wolfs or as a passive income from a Wolf Pen. Its a essential material used to craft different types of Crossbows, Bows and Reins.

The slower method to get it is to kill and harvest Wolfs with a Stone Hunting Knife. The probability of obtaining Tendon from harvesting are very low, but the chance is there.

The much more effective way to get Tendon is by building a Wolf Pen. Catch and breed Wolfs to get a permanent passive income of Tendon and other resources if you feed them. Once you hit level 33 you can unlock it. Press “P” to open “Crafting & Recipes” and unlock “Animal Pen”.

Check out this guide to learn more about Pens and how to catch and breed Wolfs.

The more animals are in the Pen, the more ressources you get. You can build Pens for every animal in the game except of horses, elephants and rhinos.