Alright this is a better place to have this argument. It wont just be Touma vs Kumogawa. Its gonna be how he and his power interacts with certain things.
To get a clear idea of what we are working with, Imma need
@Paxton @Astaro and if he wants
@Cryso Agori to simply break down IB. Strength, Weaknesses, The Strongest thing its worked on, What its failed to work on. And then I guess we can go from there.
Uh, aight sure.
Strongest thing it worked on was Othinus's Gungnir. Which itself is a can of worms cause of whether or not its universal/multiversal debates.
Thing is tho, is that in NT9 when Touma blocks Gungnir, it breaks his fingers. However later in the series NT22, Touma blocks Magick Flaming Sword, an attack that's equal to Gungnir, with no damage to his right hand, so it got stronger.
It's weaknesses are
1. attacks that happen inside the body/centralized effects, IB can't block magic within the body, first volume has him being unable to break the seal on Index simply by touching her because the seal was in her throat. In the second volume Izzard attacks touma by paralyzing his legs from the inside, Touma was able to negate it, but he had to touch his legs to do so. Touma also got memory wiped by Izzard too, he was only able to negate it by touching his head with IB.
Similarly, Misaki, an esper can use telepathy and mind control on Touma as long as he doesn't touch his head with his right hand.
2. Beam attacks/magic with an outside power source
Magic attacks that have a power source outside of IB's touch can come back or keep going even after being negated. For example Touma can block beam attacks but he can't fully negate the attack because IB only negates the magic touching his hand.
In the first volume he had trouble with Innocentius because while he could negate Innocentius, Innocentius was powered by runes all over the walls, too many for touma to negate, so even after being negated it simply came back, and it was coming back faster than IB could negate.
In the second volume, Izzard had placed a boundary within the Misawa Cram School, while Touma could partially negate the boundary where he touches it, as long as he didn't the negate power source the boundary would just regenerate.
There's also Magick Flaming Sword. But's its quite weird.
Despite being a magical attack, somehow, due to Coronzon having a body, Magick Flaming Sword wasn't considered supernatural and blew his hand off, but after Accelerator exorcised her from the body, as just a soul, Touma was able to negate Magick Flaming Sword.
It's some weird interaction that only applies to Magick Flaming Sword it seems.