The curse mark was starting to take over since Tendo was in a weakened state. He had made it his own but it still followed some of the same rules of the original mark, especially since he hadn't fully mastered it yet. At that point, he wouldn't need to worry about situations like this happening again.
Before it could be let out though, Tendo felt someone grab his palms and he heard a voice ring out in his ear.
Nodama: "Seal!"
Ryutama: "Good. Boy, this power is not fully yours yet so I don't permit you to use it until you master it. As soon as you complete my test we will unseal it and you may have to battle it for control of your body. Good luck."
Tendo: "Thanks, old man."
Tendo got up from the ground and caught his breath before rushing at the group once again to finish them off. Outside in the real world, the two men were watching the battle closely. The old man had his eyes closed and Nodama had his hands on the old man's shoulders, looking into the Genjutsu with him.
Nodama: "Master, what do you think about him?"
Ryutama: "Hmph! How did he survive this long without getting killed in battle at the Land of Waves? Are the Shinobi of this era that weak? His taijutsu skills are poor, his ninjutsu is even worse and how can he call himself a shinobi without even learning one Genjutsu? His hidden weapons were impressive at first but they lost their luster soon after. They don't compliment his way of fighting one bit. The only thing I can compliment is his will and his ruthlessness as that part reminds me of myself. He has to learn what it means to be Senju, what it means to possess both an Indestructible and Irresistible force."
Nodama: "Haha! So that means you'll train him, master?"
Ryutama: "He has potential but let's see if he has the will to pull through my training. At least he has more potential than that disappointment Tsunade. Hashirama must be rolling in his grave whenever he sees his grand-daughter dare to call herself a Senju with such pitiful strength."
Nodama: "Alright, master, calm down. Haha, I know you miss the days when you were young and had trained Hashirama and his brothers. Although Butsuma didn't have that much potential, he had some good sons. But that time is gone now and we haven't had a worthy Senju in years. Tobirama was barely worth it as one of us so I never would've thought that he would be the one to have a grandson of this caliber. Ah, there he is coming out of the Genjutsu now."
Tendo opened his eyes once again to find himself in the room facing the two men. He could barely stand as he felt the injuries all over his body, but he knew that if he started to falter now that the old man wouldn't accept him as a student. A few minutes passed by as Tendo continued standing there and finally the old man opened his eyes.
Ryutama: "Hm. Good, you caught on. Go and rest. We will begin training tomorrow."
Tendo: "....."
Nodama: "Master...Haha, the boy fell unconscious on his feet!"
Ryutama: "Good! Nodama, take him to his room and don't treat his injuries. These are the results of his mistakes so he must live with them."
On the following day, they began to train Tendo. The old man had put training beads around his entire body to add an extreme amount of weight to it. When he had woken up he couldn't even move for an entire hour. His injuries were still fresh on his body and combined with the weights, the pain they caused was otherworldly.
When he finally managed to stumble out of his room, he felt someone punch him to the face and knock him down before he could even register what had happened. Looking up, he saw Nodama standing in front of him with a smile on his face and a set of black bandages in his hands.
Nodama: "Haha, good morning Tendo! Time to start training!"
Tendo: "Understood, Nodama but wh-'"
Nodama ripped off Tendo's clothes and wrapped his body with the bandages with blinding speed. Before Tendo could say anything, he already had on a new set of clothing and bandages wrapped around him. His eyes were even blindfolded with his leaf headband.
Tendo: "Um, Nodama? What is this for?"
Nodama: "Master said that since that fool Hiashi thinks that the Byakugan is so special, he'll make you pass the test without even using your eyes. Also, the bandages around you are chakra canceling variants. You can't expel chakra out of all your tenketsu like a Hyuga can as long as these are wrapped around you. You can only do it from your palms or feet. By the way, have you felt that your chakra has finally stabilized?"
Tendo: "Thats an interesting training method but ill try it. And yes, now that you talk about it, I have felt it stabilize? Did something happen?"
Nodama: "Haha! Don't you feel it? A connection to the earth? You've unlocked your Earth Release! Thats why you're barefooted. Instead of using your eyes to see, use the vibrations in the earth to navigate yourself. Master said you'll have to take the exams like that too so you'll need to get used to it! Now let's get to training!"
The training was harsh, to say the least. Every morning for the next week Tendo was beaten up by both men to harden his body, he learned a secret Taijutsu technique called The Indestructible Fist from the old man and he even learned some Earth Style Techniques. He had to stand under a landslide and let the rocks fall on him without moving an inch. Every time he did, he would be hit on a random part of his body by the old man.
Apparently, the old man wanted him to use only Earth Style Jutsu in the exams and he couldn't use another nature transformation because the old man put a seal on him. In the afternoons, he learned about Senju history and what they were like before they made the Hidden leaf with the Uchiha. After they finished that, Ryutama would have him go to the back of the clan and punch a medium-sized mountain. He wouldn't be allowed to move until he punched about 3 inches inside it every day. If rocks fell on him, he couldn't move as that counted as another form of training.
In the nights, they had him training his curse mark as the old man was interested in what it would look like if mastered. Currently, Tendo was lying on his bed after a hard day of training. He couldn't use his eyes for even one second for the past week. He received multiple new scars on his body and his face had a scar in the shape of an X on his left side. He laughed at himself because he looked like some kind of cartoon-ish villain now.
Tendo: 'This is the hardest training regimen I've ever had. Even the old man back in my world wasn't so ruthless. But, I can take it. I can feel that this will end in something that will aid me in gaining strength tremendously. I wonder though, why are they training me so hard? That old man looks like he's about 500 years old at least so how is even still alive?'