After defeating the Shazdom and the SS-Rank General of Terrors, something flew out from Shazdom's body (like a "Black-Spirit") then stick on the back of the armor of Rizing-Izagi since his golden armor has fuse with the Deszadom's energy, so it's possible for the black-spirit to possessed on the Izagi's armor. However, no ordinary black-spirit can do this, this one is a special one that had been prepared by the terrors. Still remember in part-2 when Kyoga and Corvin arrived at a bunker on a small island? The bunker was doing some activity thereby directly turning humans into terror without being possessed by black-spirit. Inside the bunker actually there is another room, a secret-room where this "special" black-spirit was created and as well the Shazdom. Well, It's a special gift for Rizing-Izagi from the terror, and he didn't realize it after he and his companion returned to ECG with the both relics in their hands when he changed back to human form (Kyoga). Even the ECG security's system has missed it. It can only detect when the black-spirit is possessed on the Knights or flying by to get through the gate of ECG's Base. Day by day it has been so quiet, the Knights as usual doing their duty as they were tasked for, including the Golden-Knights. Kyoga has been doing some missions repeatedly for 1 year after the incident at the monument but he still doesn't realize he's in danger. From time to time, the black-spirit which possessed the armor, now has been moving and hiding into the Deszadom's fuse since the fuse itself has contained the aura of terror, so it's the perfect hiding place for it. The more often he transforms into Rizing-Izagi, the more he feels to be consumed by the black-spirit. Little by little, Kyoga's behavior has changed. Now he has become temperament and violent than he used to be. No one realized that even for his golden fellows. They thought it might be the pressure of being a Golden-Knight and not mentioning the missions they carry out, which could lead to stress. He heard voices that talked to him, but he never paid attention to it. He thought he just hallucinated. One day, the Golden-Knights were assigned by the Elders to do some training with some newcomers of Silver-Knights. In a training battle (one on one), Kyoga broke one of the silver knight's arms. So Toma came to confront him.

Toma: "Kyoga... seriously, man?? Do you have to do this???"

Kyoga: "What?? Are you complaining about my method? If he couldn't overcome this training match, then he won't ready for the real one... it's better for him to quit than suicide..."

Toma: "You may be right but It is just training, no need to be so harsh, man..."

Kyoga: "I know what I'm doing, I don't need you to tell me what to do..."

Toma: "I'm just telling you, okay? What's the matter with you??"

Kyoga: "if you keep talking... just report me to the elders, I don't care..." (walk away from that place),

Toma: "Hey...!! Wait a minute...!! Kyoga... I'm not finished yet..."

Enzo: "Enough... he won't listen to you anymore, no matter what you said. He just doesn't even bother..."

Tenya: "What's happening to him???"

Renki: "Don't know, man... but something is wrong indeed. He's not the usual one."

Tenya and Corvin just keep quiet as Kyoga walks away from there. The golden fellows really can feel something wrong with Kyoga but they can't tell what went wrong. One time, Corvin was told to carry out a mission with Kyoga, once again. Toma and the other golden fellows ask Corvin to pay attention to Kyoga, who knows what he might do. On that day, they leave with one motorbike together. Afterwards, they arrive at a big town. Somewhere in the middle of the city, Kyoga and Corvin were staying on a rooftop building while watching another building across the street. Not long after, 2 cars came out from the building's park.

Corvin: "They're out..."

Kyoga: "You take care of the back, I'll take care of the front..."

Corvin: "Huh??"

Before Corvin understood what Kyoga meant, he ran off and jumped to another building and another building with the intention to chase the front car.

Corvin: "Wait...!!! Oh, shit...!! How did he do that???"

Corvin was so surprised to see Kyoga can jump from one building to another as the gap of the building was quite far in the distance. It's beyond human's ability or even for Knights. Corvin can't believe what he saw, but this is definitely something not right about Kyoga. However, he has no time to think about that first. Now the important thing is to finish the mission first. Then Corvin immediately ran off from the building to get their bike and chase those cars. When Corvin tailed on the car no. 2 from behind, Kyoga already on the hood of the car No.1 ahead. The cease fire occurred as they were firing at Kyoga because he tried to sneak into the car, but the people inside the car wouldn't allow it. A while later, Kyoga managed to pull someone out of the car from the right side of the window and throw him away to the side of the road. Corvin saw it with his eyes open wide. It's crazy he thinks. Then the one that Kyoga threw out from the window suddenly changed into terror and ran as quickly as he could, to chase the car with Kyoga on the top of it. And another one passenger inside the car also changed into terror with his extra hands on his back (like spider's leg) stab on the car and come out from the car window of the left side. The other terror who's on the run managed to get near the car, and directly jump up on Kyoga to attack him. Kyoga saw those two B-Rank terrors try to attack him from both sides (left and right), so he jumps high to avoid them and quickly transform in the air (into Izagi).

Kyoga: "Hensō...!!! Sringgg..." (armor on), szinnggg... (pull out the sword), bzinnggg, frinnggg...(stab the sword on the car roof),

The moment Izagi stabbed the sword on the car roof, it caused the elemental explosion surrounding it. The both terrors bounce away and hit on each side of the building there, even the cars are wrecked because of the energy breaks from Izagi strikes. Corvin was shocked when he saw Izagi in action like that. He couldn't imagine what would happen if any humans were in that car. However, what has happened already happened. Nothing can be undo for now. Meanwhile, the car No. 2 that was being chased by Corvin couldn't avoid the sudden stop of the car No.1 and came to an end, hit on it then flying away and flipped over before hitting the ground. Afterwards, the car No. 2 which had flipped over suddenly blew away, then three terrors jumped out. They are A-rank terrors. A-rank terror 1 jumps on the road-side lamp, the other two jump to stick on the wall at right side and left side. Then three of them jumps together right away toward Izagi, however he quickly jumps backward to avoid them and using one of his signature skill "Seikō-Jūjizan (StarLight-Cross Slash)"  to strikes on those three terrors as he already predicted that his strikes will eventually hitting on one of them (even not three of them) and he was just right. The strikes just right away hit on the middle terror and turn him into dust. The other two managed to get away but the impact of the strikes blew them away to each side of the building. Meanwhile, the other two B-rank terrors from earlier, also ready in action as well as they already recovered from paralyzed from a moment ago when they were hit by Izagi. Now Corvin and Izagi have been surrounded by a bunch of terrors from front and back. Two B-rank terrors at the back and two A-rank terrors at front. The other side, Corvin who was just watching the show at the moment, now trying to get into action as he realized he has been surrounded and must quickly do something before something bad happens to himself. He immediately transformed into golden-knight Gokagi to stand-by. Then the two B-Rank terrors are running towards to attack them, Gokagi ready to confront them as his position was the nearest and on the other side, the other two A-rank terrors also charge at the same time on Izagi. So he jumps high and spins over to get behind them and immediately uses another skill "Seikō-Shōsenzan (StarLight-Soaring Flash Slash)"  to blast on them. One of the A-rank terror was already realized the moment before Izagi released his strike, so he already predicted it and tried to avoid it as fast as he could so he wouldn't get directly hit by the strike. However, when the strikes came even he could avoid right away but still, he got hit by the impact blow of the strike that caused one of his legs to be severed. However, his friend, not that lucky, liked him as his fellow was hit by the Izagi's strike directly and led him to his tomb. Now that A-rank terror was left alone. He managed to get away after his leg severed and jumped to the building wall at the left side and then charged toward Izagi. The sound of exploding was heard on the surroundings as they both ended up crashing inside one of the buildings there. Gokagi-Corvin, who was focused on his battle, suddenly noticed a surprise caused by that sound. He quickly recovered from his senses, remembering that he was still fighting. Lucky for him, that he still managed to recover his mind sooner, if not he will be in trouble. Since he is still in battle, he doesn't have time to worry about other things. Now on his mind is how to finish his battle faster and right away assist Izagi because don't know what Izagi might do if Izagi went wild on his own. His mind was distracted a little a while ago, so he kept being pushed back by those two B-rank terrors. Gokagi-Corvin gets frustrated as he is being cornered by those two lower rank terrors. It's a humiliation for him as he can't accept it. After being pushed backwards away quite far from the terrors position, he charged toward them by jumping high to the air and hit his sword on the ground with elemental strike. For the record, because his element is earth so when he strikes on the ground with elemental strikes it can cause a gravitation pressure surrounding him which can make his target unable to move for temporary (except the user). Then, he quickly jumps in the air and uses one of his signature skills "Sagan-Jihōzan (SandRock-EarthSlide Slash)". with only one strike, he dismissed two B-rank terrors at once. When he tried to go to Izagi position, suddenly he heard another explosion sound that came from the same building again and he saw an A-rank terror was flying out from the explosion and hit on the building across as he was pushed away by someone. He realized it must be Izagi. Not long after, someone shows up from the first wrecked building. It's Izagi, no, it's not Izagi, it's Rizing-Izagi. It seems like Izagi has transformed again and changed into Rizing-Izagi.