The Wood-Giant's Hands
Eisen shaped the crystalized mana into a three-dimensional spell that was meant to support the agile and dexterous movement of the Wood-Giant's body from inside the hands before enveloping it in a layer of mana-crystal. The outside of that crystal was then enchanted so that it would be possible to actually make proper use of the spell.
Then, all that Eisen needed to do was simply remove part of the wooden sphere that would act as one of the joints and then place the enchantment-spell item into the center before properly placing the wood back to where they it was supposed to go. Following that, Eisen started forming the different extra parts that he needed before creating the enchantments inside of each of the joints.