Wither Armor Mod 1.7.10 adds an armor, crafted with a nether stars and a wither skeleton skulls, which gives a different permanent effects.
Just put wither skeleton skulls in shape of the desired armor part, with a nether star in the middle slot. For the Chestplate the nether star should be in the middle upper slot.
Wither Armor Mod 1.7.10 Download Links:
For Minecraft 1.7.10