Obviously, this is a Forge Mod.
This mod adds Spartan Armor (+ Red/Blue dyed variants), an invisibility cloak, and some Red/Blue colored blocks.
The Spartan armor might be considered "Over powered", but consider that you need diamonds and Iron Blocks to make it, it kinda balances it out.
It's highly recommended that you run this mod alongside Not/Just Enough Items.
Note: If you're using the 1.10+ versions of the mod, please be sure to download CTD Core!
Twitter - @DaMG156