Just so that he could get a good idea for what he wanted that Wood-Giant to function like, Eisen started using his visualization in a slightly similar way to the manner that he tried to gain as much proficiency as possible in his crafting space and crafter's mind skills.
But instead of actually physically trying to make a 'double' of himself create items, he just wanted to pretend as if that was the case. He basically just wanted to go through the whole process of building that wood-giant for now. And since Eisen didn't want to practice actually making it just yet, he didn't use the deep visualization state. That would require him to already know how exactly he wanted to do.
He had already taken care of the visuals together with Evalia, but the mechanics still were an issue. On one hand, Eisen could just try to scale his regular Golem-Mechanics up so that they were fitted into the wood-giant's frame, but that seemed like a slight waste. After all, since the wood-giant was supposed to end up being maybe 40-45 meters tall at the very least, there was really a lot of space to make use of.
Inside of the joints, the bones, and of course the place where Eisen usually placed things like artificial organs.
This wood-giant was supposed to be one that was capable of helping take care of mountain-sized monsters, so it needed a fair amount of physical capabilities. Thinking that, since Eisen was first trying to plan out the actual body, the old man figured that the hands were the best place to start planning.
The wood-giant would of course get a weapon that fit its scale later on, but there would surely be situations when it had to simply use its hands instead of being able to use a sword. For one, climbing was a pretty good part. That meant that its hands needed to for one, be dexterous enough to make climbing feasible. So, Eisen had to take good care of the joints for one. But that shouldn't be too hard, since the joints should end up being more than large enough to house a couple of good mechanics and enchantments.
Other than that, Eisen also thought that he had to change the texture of the fingers a little bit. Maybe turn them hook-like to make it easier to dig into something. Or better even, basically turn the fingertips into enchantments that would allow the wood-giant to make use of transmutation to burrow his fingers into non-biological surfaces, at least. A mixture of both sounded pretty good as well.
Since Eisen brainstormed some ideas for climbing with himself now, he thought about the actual combat part, and what kinds of enchantments he should put onto it in general. In what ways it should have non-wood materials, and in what ways the bark-armor would be best integrated into the hands.
It didn't take long for Eisen to actually somewhat figure all these parts out, and in the end, he figured that the hands were a relatively good, and easy, way to actually test a few things out. And so, the old man made his way over toward the tree and looked around for what sections might be the ones that he should best use. He still had to strip the bark away anyway later on, and that would take a fair while in itself, so Eisen thought this was also a good chance to inspect the tree for any sort of damages.
In the end, Eisen made his way all the way over toward the tree's crown and was now climbing through this place to see if there was anything interesting to use here. And then, he thought about it for a while.
"The best thing for the hands would really be one of these branches, huh?" He muttered to himself as he ran his hand over one of them. Since these branches seemed to have a lot more flexibility when compared to the main log, it seemed to be a pretty good material to use in this situation.
In the end, Eisen tried his best to find branches that were roughly the right size already, meaning at the very least 20 fingers wide. Toward the end, Eisen managed to find some younger branches that seemed to be the perfect fit, so Eisen quickly felled them. In the end, just detaching these smaller branches from the main tree felt more like regular woodcutting than actually felling this main tree. The branch was more like the size of a regular tree, after all.
Either way, soon, Eisen managed to gather the branches that he needed, together with a couple of reserves, and then brought them back to the stump that Eisen would simply use as a place to craft for now.
And after setting the branches down on there, the old man quickly got to work. With his size fully increased while even his Draconic Demon Form was active, Eisen was able to pretty easily strip away the bark of these branches, since it was basically just like carving regular sticks now.
After the branches were stripped, Eisen cut off a bit of the branches' bases for later, and then tried his best to shape each of them into a singular finger already, even if it for now was fully connected and didn't have joints yet. One after another, the branches took the shape they were meant to until Eisen could place them to the side. He actually made the fingers a little bit thicker than the end-product should end up being, since that would make it easier to actually fine tune everything later on.
Eisen looked at the two-meter long fingers and slowly nodded his head when he was really satisfied with their size, and then started to cut through the fingers right where their joints usually were, and then gave each place that would be connected to a joint an inwardly hollow shape before grabbing the parts that he cut off the branches beforehand.
These were simply turned into wooden spheres for the joints, and for now Eisen just tried his best to make sure that they fit together well size-wise instead of focusing on the functionality.
Either way, what Eisen did then was to simply hollow each of these wood-fingers from where Eisen rounded them out for the joints beforehand, while still keeping the 'wall' thick enough to ensure that the fingers wouldn't crack easily. Eisen still tried to keep a little bit of the 'curve' for the joints there and made sure that the hollow spaces weren't large enough to let the joints in. And on top of that, Eisen tried his best to assist the whole thing with transmutation, so that he wasn't just scraping the inside of the fingers out, but instead could just pull the whole 'core' out rather easily.
This was, Eisen was able to start properly turning these cores into their own self-contained mechanical pieces, which would act as a replacement for the bones. They still took inspiration from bones shape-wise, but for the most part, they didn't have much in common functionality-wise.
These bones were basically the containers for the enchantments for the hand. They would end up just being a section of the larger enchantment-system that was the whole hand, which was part of the bigger system as the arm, which then was part of the whole body's enchantment system. Basically, these things were supposed to really combine musculature, bones, blood & mana flow, as well as the central nervous system.
This was for one done by filling these wooden-cores with different hollow tubes, crystal-thread bundles, and the basis for a three-dimensional enchantment that Eisen would try figuring out with Xenia's help later on.
Either way, all of this in itself already took a fair while, since Eisen was working on everything rather slowly, as he still wasn't 100% sure how he should go about things when he first started working on them. After Eisen finished changing these cores around, he simply started working on the actual 'skin' or 'shells', or however you may want to call it. To start it off with, Eisen started to try roughing the insides of the fingers up a little bit instead of having them be smooth and flat, so that they had a bit more natural grip to them. Then here and there, Eisen turned a few parts of the fingers into things like hooks and spikes. Real hands would be quite terrifying if they were like this, but Eisen figured that, since this thing was probably not planning on holding someone else's hand anytime soon, it should be fine.
Although... Eisen's plan was to turn it into an ego-golem so that it could take care of complex commands more easily, so it might actually end up turning sentient enough to do just that at some point. If that time came, it shouldn't be too hard to smooth everything down anyway, even if it should probably happen naturally after climbing a few times.
Either way, after Eisen added the raw shape to the inside of the fingers, he also got started on carving the 'fingerprints' in the form of highly-detailed enchantments that were meant to make use of the transmutation ability that Eisen placed into a small gem in the center of the enchantment to burrow into things like rock or even wood more easily.
"I should probably fill this in as well later." The old man muttered to himself quietly, as he placed the first of the fingertips to the side to continue with the next one, all the whilst trying to figure out what materials would be best suited to this.
Once he got done with the fingertips, Eisen moved on to the joints. They were definitely one of the most important parts about the wood-giant, or Eisen's golems in general, since they were the parts that allowed for the complex movements that Eisen had in mind.
Since these joints were a fair bit larger than regular ones, he could really fit in a lot more into here than he was used to, even if he still chose to keep the brunt of what he usually went for.
Two places where the joints and the 'limbs' connected to it were actually physically connected, as well as a general three-dimensional enchantment that would both hold everything together magically while allowing for the movement. But Eisen figured that this was a good chance to make use of one of his 'Draconic Gifts' and include it in everything as well.
It simply seemed like the perfect place to include magic items. Spells were often a lot more versatile and had a farther range as well as more independability when compared to enchantments since they were separated from the material they were placed onto.
But at the same time, since instead of simply taking mana and transforming it, they were made of mana themselves, which made the effect oftentimes much stronger. So, for now, Eisen chose to combine the effect that both enchantments and magic circles had, by creating a three-dimensional enchantment with a three-dimensional spell-item in its center.