Knights End: How to Set Your Friends on Fire and Get a Cool Mace

You will have to go the shop keeper outside your home and look for a fire crystal, you should be able to get one day one with the gold from your home. If he does not have one you might have to wait a night before you get to burning

Once you get your fire crystal you will have have to locate your friends and show them your cool new rock

Once you locate your friends throw the crystal at them and watch the fire grow and enjoy the fruits of your labor

simply loot the burnt body of your friends and enjoy your new mace