How to tame a castoroides, easy! As long as you have an argie.
Step 1: Find the beaver on your argie.
Step 2: Pick up said beaver.
Step 3: Make a trap, any mats. One foundation, and four doorframes.
Step 4: Drop beaver in. (Note: Might be a bit difficult to get the beaver in.)
Step 5: Tranq the beaver. (Oh and make sure you have berries. Lots of berries.)
Now, use your preferred taming method, and there you go!
Snatch one of these things with an argy and take it far far away from the rest of the beavers, knock it and tame
It and then massacre the rest of its family and take the wood and cementing paste from the dam 🤗