Uranium, Lead, and Radiation

Irradiated Uranium ore would add a neat element to the deep dark, requiring lead lined armor for protection from radiation poisoning(or perhaps skip the lead and go for a hazmat enchantment). Also hurts certain mobs. Uranium blocks can be used for defenses, farms etc. Also a uranium ingot can be used in stead of blaze powder in brewing stands or as a fuel to smelt 200 items in a forge(used to smelt stone type blocks twice as fast as a furnace) or a blast furnace