Soul Cairn

I don’t know how they did it, but the research team returned from the End. Those of them that were still coherent brought this peculiar rock with them. For now we have dubbed it “End Stone”. Its odd properties have proven quite interesting so far. To wit:

A barrel made of End Stone empowers the weirdness going on inside.

can’t figure out how this is done yet, but when a blast of air is pushed through a barrel made out of this stuff it …changes. A creature hit by this blast dies in a flash and the diamond resting in the chamber seems to be filled with its life force, creating a mob egg.

This appears to require a single diamond per egg.

More research has to be done here.