Searching for a specific magic beast in The Forest of Beast maybe are quite difficult for other people, but with Faust's spirit surveillance system it is quite an easy task. What Faust needed to do was to tell the many spirits that were following him what magic beast he wanted to search, and they all will scatter around the forest to search for what Faust told them to find.
And it is not only limited to magic beasts. He can also use the spirit surveillance system to look for other things. Like one time when Angra forgot where did he put his halberd, Angra asked Faust for help then he told the spirits to search for his brother's weapon and the spirits can quickly found the lost halberd.
Although Faust can not communicate with the spirits properly like having a full-on conversation with them, he is still able to sense and feel what the spirits that are consist of many animal souls are trying to convey to him and it also works the other way around.
When they found the rank 1 magic boar, a solid wind arrow is all it took to pierce through the boar's cranium and destroy its content. After confirming that the magic boar is really dead, Mark went and picked up the magic boar and carried it on his shoulder.
Since he wanted to teach the twins how to prepare and butcher the hunted magic beasts so they will know what useful parts that they can sell to earn money, he told the twins to hunt a few more rank magic beasts and a different one other than the boar so he can also teach them how to process different magic beasts. With his sons' cheat abilities like the many spirits that listen to the elder son's command and the combined athleticism and fluency in fusion magic of the younger son, searching and killing a few more rank 1 magic beasts only needed a much or less 10 minutes. While soul vision enabled both of the twins to see souls, the younger one cannot control them and the spirits are actually either afraid or didn't like him.
The spirits will search for the target and when they found it, they will go back and tell Isaac where it is, while the spirits have a corporeal body that enabled them to move while passing through objects, Aiden's speed and mastery in controlling his body allowed him to maneuver through the trees and their thick roots that sometimes protruded from the forest ground and keep up with the spirits that are able to move straight through the trees.
Seeing that they are now able to deal with rank 1 magic beasts as easy as picking up vegetables, Faust wondered how strong is the zombie crew right now. Faust told the zombie crew to do their own hunting session to level up and increase their rank, with the addition of Pat Kai, it will maybe take a longer time for all of them to reach rank 3, but Faust hoped that his investment in the skeleton boar that used to be a mutant magic beast to pay off later when Pat Kai becomes a higher-ranked magic beast.
After getting 5 rank 1 magic beasts, they then brought the magic beasts back to their home to the shed that Mark uses for the place where he butchers the magic beasts that he hunted.
Mark hang the 5 magic beasts upside down on a hanger that he attached to the wooden wall of the shed. Then he started explaining to the twins.
"First, what we need to do is to drain their blood dry. We do this because keeping blood in the meat would cause it to turn rancid very quickly."
Mark then place 5 buckets each beneath the head of the hanged magic beasts and slit their throat and blood started to flow out of their neck down into the buckets below.
"Next, we need to skin them because the skin of magic beasts are highly sought after and you can sell a good quality hide that has minimal damages on them for far more expensive than the ones that have holes on them."
Mark cut a magic deer horizontally from its throat to its tail from its belly side.
"What you need to remember when skinning an animal is that you only need to cut when necessary, too many unnecessary cuts to the skin will damage the skin that you'll be selling. And don't cut too deep into the skin because you may damage the meat below or worse you may cut through the intestines and bladder causing the meat to spoil."
"After you finished skinning the animal, don't forget to take out their intestines and bladder, you can sell the intestines and throw away the bladder if it's not useful, but remember that some magic beasts' bladder can be used for medicine or other stuff."
After Mark showed the twins the mastery and skill that could only be seen from years of being a hunter, he turned to the kids and asked
"Who wants to try first?"
Aiden raised his hand and said "Me"
He then grabbed the knife that Mark used for skinning the magic dear and went to the hanged magic boar. He tried to imitate and remember all the steps that Mark had explained to them earlier. With his steady movements and aptitude in using a weapon, Aiden successfully skinned his first animal with as little damage as possible to the magic boar.
"Amazing work Aiden! It seems like that you are talented in doing this."
Aiden then coughed a little hearing his father's compliment and said
"It's nothing" but the smug look on his face and the proud posture of his body showed another emotion rather than what came out of his mouth.
"Dad dad!, I want to try it too!" Isaac said while repeatedly raising his hand.
After Mark gave an ok to Isaac's request, Aiden passed the knife to Isaac, and Isaac proceeds to go to the other magic deer that is hanged beside the magic boar.
Isaac imagined in his head how he would also skin the deer skilfully, he thought of how to move his knife so he would do as little damage as possible to the skin and meat under it.
After he finished cooking up a strategy in his mind, he then started to cut the skin starting from the belly to its throat, his knife slowly went downwards from the base of the tail to the neck and
"Isaac your knife went too deep and damaged the meat under the skin, luckily you didn't cut open the bladder and the bowels in the belly. But if the meat under is damaged, it will be hard to sell it to the butcher in the village. Try controlling your strength so that the cut won't be too deep."
Isaac then proceeds as told and used less force than before to skin the magic boar, he is pretty confident this time but
"Wait, not like that Isaac, the cut is too shallow that the skin is not separated properly from the meat under. You have to find the right amount of strength to use not to damage the meat and strong enough to separate the skin properly."
Isaac tried it again then
"No, it should be like…"
"It is still too strong, you damaged the muscle."
"Your hand is not steady enough, try cutting it in a straight line"
Faust is so frustrated that he wants to cussed out so hard, but he remembers that a six years old is not supposed to be throwing 'F*ck this shit I'm out' out of their mouth so he held it in and instead a solid flame sword appeared on his right hand and from his posture, it looks like he is ready to directly cut the boar, the whole shed in two.
"Woah easy there Isaac! Alright, let me finish this up and don't be upset about it, It required talent and practice to do it properly, and since this is your first time, it is only normal that you do many mistakes."
Isaac looked at his father who is just trying to calm him down and next looked at his brother who just did it 'properly' even though it is his first time skinning an animal.
Although Faust didn't say anything when he looked at Angra, Angra kind of knew what he meant by looking at him with a sharp gaze, and to respond to that glare, Angra just lifted both his shoulder up then followed by both of his hand then he just shrug it away.
After Mark convincing Isaac that it's really okay and he didn't need to be angry about it, Isaac finally put out his flame sword and put the butchering knife back to a wooden table at the corner of the room.
"Boys after this, let's go to the village and help me sell the magic beasts."
"Okay dad." answered both of the twins.
'Ah, I hope he is not in a bad mood because of this. I guess even though they have insane talent and seem mature at times, a kid is still a kid after all.'
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'Why are you so upset about skinning an animal Faust?'
'DO YOU KNOW THAT I HAVE MADE A THROUGHOUT STRATEGY ON HOW TO SKIN THAT DAMN MAGIC BOAR IN MY MIND?'
'WHILE YOU JUST WING IT AND DID IT WELL, WHAT THE HELL IS THAT GRA? IS THIS WHAT YOU CALL FAIR?'
'Ah, yes. Maybe being a demon that was locked up for thousands of years before finally able to regain his freedom only to die a decade later is fair.'
'Wait no Gra, it's not what I mean, don't be sad about it, I'm sorry.'
'Just kidding, suck it up that I'm much much better than you at some things Faust!'
'Just you wait Gra, I will definitely be able to skin all kinds of animals and even dinosaurs this month!'