The story is interesting, but the MC keeps being stupid.
It is getting to be tiring.
For somebody who was supposed to have been trained at fighting, he absolutely lacks any strategy when fighting. Charging directly and smashing fists into the opponent's gut is not a strategy.
For somebody who is a "supermage" - aka has both magic and melee skills, he rarely uses his magic to any useful degree.
For somebody who's emotions have been muted to a point of elimination, he constantly fights angry and makes hasty decisions.
I am just tired of reading stories where the MC is behaving like a oaf and doesn't do common sense things like using his skills synergetically and making a basic assessment and strategy when doing things.
I will try to give an example from the book without giving away much, but if you are afraid of the tiniest spoiler skip the following paragraph:
Fight starts, MC will fight somebody who he knows wants to kill him and they are direct competitors.
What does the MC do - starts the fight by using the time slowing skill to charge from too far away, the skill effect ends before MC can reach the opponent, this is followed by the MC getting a beat down (common theme in this book) for a long time until he miraculously wins in the last seconds.
What the MC should have done if he has an IQ greater than a mushroom's- let the enemy charge him, shoot the charging enemy with his long distance "fireball" attack to soften them up.
As the enemy is close, use the time slowing skill to beat on them for the full 3-4 secs when the skill makes the enemy into a motionless punching bag. When attacking, use a combination of the time slowing/acceleration skill + create a piercing weapon in his hand and hit the enemy in the eyes, throat and other vulnerable areas. Can even add the nature power ability that doubles his punching force to the above. Result - enemy dead in 1-2 hits. Fight over in 5 secs.
Start using planning, try to attack your enemy while they are not aware of you instead of going a Leroy Jenkins. Use all your abilities and skills - simple example: create short earth walls to trip them as they charge you, create holes in the ground so they can trip, trip them and create a rock spike to impale them as they fall.
Also stop hitting people in the gut or face with a fist, especially with an enlarged fist - hitting in the gut is not the most damaging place to hit. Hitting with a fist reduces the force of the blow compared to hitting with straight fingers or a weapon - hit vulnerable areas.
Hitting with something that has a small surface area increases the force of the blow many times. Hitting at high speeds increases the force of the blow many times. After all force is just mass multiplied by acceleration.
For somebody who can instantly accelerate to 60-80 mph and combine this with a skill that adds explosive acceleration to a point where time seems to slow down, most fights should end with a single blow.
Any 12 yo kid that has played an RPG will plan the fights better than the MC who has been trained for years+ fights endless challenging fights in beast areas all the time. The MC fights like a street thug on crack. Makes no sense.
So yeah, the story is interesting, the world is interesting, but I am so tired of authors who give the MC powers and are then afraid to use them in a way that makes sense. Have to artificially make the MC dumb so they have a challenge.
Oh and please, figure out what the rules of the skills are. I ran into several questionable cases, but the one I remember best is when a dozen ice spears can only scratch somebody's skin, how can the same attacker stick an ice knife in the back of their head minutes later?