The Barterer Mod

Introducing the Barterer: a new entity summoned using the new Barter Bell block. He accepts all the junk you have, just give it to him and get some emeralds in return; jst don't hit him, he gets scared easily.

When you try to summon the Barterer, the Barter Bell will first generate a little square for him to find after 5 minutes; but if you just want to use the bell as decoration without the fear of destroying your build, right-click it with the new Bell Calibrator, which will deactivate it (right-click again to reactivate).