The magic what David used was a space rift spell, it is a white magic spell that David invented using the scientific theory of space and dimension, by taking advantage of this knowledge from his former world, David created a spell that create unstable space rift which turn every inorganic into powder and minch any organic, since his target were organic, they become minched meat, Ba'al was furious after being humiliated by a supposedly magicless individual, however, he still believes that he can defeat him, which is the reason why he didn't ran like coward like in past when he was defeated by sage Edward, Alyssa however, become more curious of David after he witness his powers, now she is sure that David like his siblings, is clearly a mage and just pretending to be magicless, she even believed that this fellow is clearly playing the pig to eat the tiger, however, there is only one thing she didn't understand, why David's aura isn't clashing with natural law around him, on contrary, the moment he used his spell, the natural law become one with him strengthening his magic, which is unnatural as the natural law known to sabotage the magic, not strengthening it, this make Alyssa to become determined to uncover the guy's secret. "Ha..., that was just a fluke, there's no way you defeat me, especially when you are a child", Ba'al sneered, of course he wasn't wrong, a boy of 14 years old has no chance of victory against a demon king including the weaker one like Ba'al, but the demon didn't the boy is only 14 years old from outside, however as transmigrator, his original age is that of an adult, still it was only 14 years that David has spent to master his magic, he wasn't sure he could win or not, fortunately, unlike black magic whose power is determined by it's user's spiritual strength, his can be increased through practice of magic, white magic which is dependent on user's mental strength, only required understanding of laws of nature, as a former scientist, David understands law of nature better than everyone else compared to other in his current self's age. David put his focus on the big boulders in the lair, lifted it with his magic, threw it on Ba'al, Ba'al used the arcane shield spell to block it, "Ha.... cheap trick", Ba'al said with hidious smile, but he made the mistake, Ba'al thought that the spell David used was an object movement spell, something he can block with a mid-tier arcane shield, but the spell was a telekinesis spell, which far stronger and complex than a mere object movement spell, on top of that as a Demon king, Ba'al also analysed David's mana and he knew that he barely used his mana, so, the impact of the moving boulders wouldn't be that great and would be completely blocked by his shield, but he was wrong, the boulder hit him with a very strong force completely breaking his arcane shield, hitting him, Ba'al was severely wounded, he broke some of his bones, and was in no condition of fighting, "Impossible, is this the sage level strength?!, is that boy a sage?!, how can sage be so young?!", Ba'al panicked, David scratched his head, as he didn't expected the impact to be that great, Alyssa have her jaw completely dropped after she saw this, she didn't expect David to be this strong, she even believes that if Thomas and David were to duel each other, even with full strength and with aid of his alchemical potions, Thomas will be send flying with just a simple spell from David, "Hey old man, I never thought you to be this weak, I wonder how you manage defeat by oldest brother and others", David said, "Weak?, your foot!!, it is you who is strong!", Ba'al shouted, Ba'al is technically right, because white magic requires mental strength, on top of that David was a scientist in his previous life, so his mental strength is quiet high, and because of white magic being a scientific supernatural power, the natural law around David itself strengthened his magic, making David's spells to be at sage level, although he must calm his mind and recall the scientific laws to make those spell succeed, otherwise, the spell would be either be cancelled or cause an accident. Now after becoming sure that he can defeat Ba'al, David used his telekinesis magic again, this he broke all structure around him and threwing all the fragments of nearby structure at full strength towards Ba'al, this time Ba'al used the Dark shield, the strongest shield a demon could have, although Ba'al's shield is quiet weak compared to the one used by other demon kings, as Ba'al was weakest among them, he believed his shield could withstand it, buying him some time to heal himself, but this shield also broke, although this time Ba'al wasn't hit, his morale was crippled, he even noticed something he didn't noticed earlier and panicked, "Monster!!, you are a monster!!, what kind of power you used, it cannot be magic!!, there's no way magic could be strengthened by natural law, as the natural law rather weaken it, as a demon I know this better than you humans.", Ba'al said in panicked voice, what Ba'al said was true afterall, demons discovered and utilised magic way before than humans as the first race to discover it, beside demons alongside elves are an all-magical races, every demon can use magic, thus amount demons who researched in magic is extremely high, in fact, demons were at the top in the magic research even surpassing elves, as they knew magic better than all races, this is the advantage that demons held towards all other races. Ba'al realising he couldn't win used blinding spell on David, David who was blinded used nanoshield spell, a spell based on nanoshield technology from David's past life, David casted this spell to defend itself and to prevent Ba'al from attacking him while he is blinded, he was right because Ba'al used his strongest spell against David, the curse of plaque, which apply all kinds of disease and poison on the victim, completely killing it's victim without any hope of recovery, even white necromancy cannot revive them, this was Ba'al's trump card and the reason why he was called the demon king of poison and disease, the spell could bypass most of the magic shield including the ones used by sages, with sage Edward being only exception as he was the only person to be strong enough to block Ba'al's ultimate spell. However, the moment his spell hit David's magic shield it completely blocked snd nullified it, the shield itself had no scratch, even sage Edward's shield was partially cracked when he fought Ba'al, but David's shield is perfectly fine without any scratch, Ba'al's morale completely collapsed, "I give up!!!", Ba'al said, he immediately used an artifact to quicky teleport away from the place, when David's blindness get removed, he noticed that Ba'al is nowhere to be found, "Damn, he got away", David said feeling disappointed, for David, Ba'al was a perfect test subject to test his white magic's efficiency. David decide to remove the restraints on Alyssa, while he was undoing the restraining spell on Alyssa decide to ask David about something, "How do you find me?", Alyssa asked, "It's simple I use tracking spell on him", David replied, while in hall David used a magic to analyse Ba'al's body cells and then marking one of his spell using his tracking spell, Ba'al's own cell become the tracking device allow David to follow him all the way to his lair, David take immense pride in his tracking magic as the only way to undo it to get rid of the marked cell which is very difficult to do with black magic, besides a white magic spell cannot be undone with disperse magic spell of black mages and anti-magic ability of priests, so, there's no way Ba'al could untrack himself without getting rid of his marked cell, in fact, David could still track him even now. "David, your magic....", Alyssa asked, "It's a secret", David said, "Even though everyone saw you?", Alyssa replied with a mischievous smile, David was confused but then as if realised something, he turned around and saw the sages, pope and his men, his father and marquis and their soldier, his siblings and half-siblings all watching him with jaw open. "Damn, do they also somehow tracked Ba'al, looks like my secret is out", David thought knowing that he no longer have any secret.
To be continued....