It chains from the rare spawn shadow quest giver in crush the keeper. ORDER:
1.) 100 Totem's = Cyber Armor.
2.) 50 Shard's = Cyber Helm.
3.) Free 25 Shadow Prisoners = Cyber Weapon.
4.) Collect 5 Shadow Essence from Small Magic Shadows or sometimes tall shadows with big arms (fat bulky ones never drop). = Cyber Sheild.
5.) Talk to Ellie in Forest Haven and enjoy a free Cyber Sheild. Hurry up and get it because this is a limitted time exploit, they will be adding a different way to collect the doll in the future if you collected the reward before the doll was out.

Yes you may only do one at a time.