Rein was struggling against this monster mainly because his ice and fire elemental attacks were not damaging it at all. But while fighting this monster and analysing it with his eye of Truth, he did manage to find a few weaknesses that this monster had.
He then decided to exploit one such weakness and started to make preparations for that. Rein baited the monster by showing it a very obvious large opening and made it to attack his with full power. A regular human would find this obvious opening suspicious but that was not the case for this monster.
By attacking Rein with all its might, the monster left a big gap in its defence and that was exactly what Rein wanted. So he immediately used his short teleportation ability to dodge the punch that this monster threw toward him.
After dodging Rein immediately attacked the monsters purely with his physical strength. He used the fire element to launch himself toward the monster which increased his strength and used ice to cover his body. That way even if the ice was unable to harm the monster, it would at least be able to protect Rein from the impact.
This was the strongest physical attack that Rein had ever made in this world. As he had never faced an enemy who was strong against his fire and ice, Rein had never tried doing it. But now that he used a physical attack with all his might, the destructive power of it was very impressive.
Just as Rein had wished, this all out attack of his was able to break through the monster's high defense stat. But the wound he had managed to make was minor which would completely heal up in just a few minutes.
Obviously Rein knew that something like this would happen so he had other plans in mind.
With his Eye of Truth, Rein had found out that the fire resistance of this monster was limited to the outer portion of the body. His inner body was actually not resistant to fire at all.
...
As for Rein, after going through the second gate, he found himself in a different location. In front of him, there was a large tree with fires burning on its branches instead of having leaves. This tree was massive, at least 100 meters tall. But everything around it was empty and dead, so instead of looking majestic and beautiful, this tree just looked scary and dangerous.
Just as Rein had expected, as soon as the tree registered his presence, it immediately attacked him. Fireballs started raining from the sky and roots covered in Eternal fire also attacked him from below. Rein used his fire and ice element as shields to block the fire rain while dodging all the roots by moving around.
But the number of the roots was so numerous that in almost no time, Rein had no more place to dodge the attacks. So he increased the power of the ice element and attacked the wall of roots attacking him. Just like that, he was able to destroy a portion of the root wall and escape the entrapment from there.
Unlike the previous opponent Rein faces, this tree was not resistant to his elements. But this tree had a large body so it was able to withstand a lot of damage. Not only that but it also had healing capabilities which was way stronger than the previous monster. So if Rein could not deal a huge amount of damage to it in a very short span of time, it would soon be able to heal and the damage would become zero.
Other than this super troublesome recovery ability, this monster's attacks were not too powerful. But as all the attacks were covered in Eternal fire, they were not harmless. And with so many things that this tree was able to use as the means of attacks, Rein was having a tough time dealing with it.
But as his elements were working on this monster, Rein was not too worried. So instead of wasting his energy by continuously dealing slight useless damage to this monster, he started to prepare a big, super destructive attack.
So would that be enough to end this battle ?