This is a unofficial port of the Animated Armor origin by ClarkUK.

If there's any issue with this port, please do let me know. Don't contact ClarkUK if you have issues with forge version. Contact me.
It is highly recommended to use Origins 1.7.11 and up because of major bugfixes.

Text Summary:

Adds the Animated Armor; a sentient suit of magically animated armor, playable as an Origin.
The Animated Armor must always wear the Living Armor set. While worn, the Origin cannot take health damage. Instead, "durability" is added as a resource on the GUI that will take 1 point of damage at a time whenever you are hit. When "durability" depletes at quarter thresholds, the Living Armor will visually break, debuffing the Origin. When "durability" full depletes, the Origin will die.
Cannot naturally heal, but must instead use Iron Ingots to restore their "durability" resource. Additionally, the Armor does not need to eat, meaning they do not exhaust or starve at all.
Immune to all status effects (positive and negative), knockback, and immune to standard arrows.
The weight of the armor prevents this Origin from swimming effectively. They will sink and walk freely while submerged in liquid.
Additionally, the Origin moves 15% slower than a human, unless all armor besides the boots are destroyed, at which point they receive a speed boost.
The Origin cannot sleep, but does not suffer from insomnia (Phantom spawns).

Animated Armor - An Origins Addon (Forge)