Petrified Sentinel

create a mob that looks like a skeleton which has the following appearance: 'A skeleton made out of stone, terracotta, or petrified wood it has glowing eyes' and the following behavior/capabilities: 'spawns in badlands, desert temples, or underground in biomes with a lot of stone. A more defensive skeleton. It could have higher health and armor points, but move slower. Instead of a bow, it might use a Stone Axe or Mace for close-range, powerful attacks. Upon death, it could drop bones, cobblestone, or even rare minerals like copper or iron nuggets.'