[Echizen777]

Originally Posted by mrSh4dy

From what I understood about the concept of magic in this series is that a magician just fools the laws of physics for a short while.
For example Miyuki's ice magic just slows down the individual particles creating the ice effect (this is how it works in our world as well) this ability to alter the state of matter is what a magician in Mahouka series does and what is obviously impossible in our world.
Miyuki doesn't create ice from nothing she uses the existing laws of physics and influences them to create ice. To do this she uses the fictional Eidos and Idea. However to actually create something out of nothing is impossible for all but Tatsuya.

Why the author overlooked this I don't know it just breaks with what he has established in this series (magic=manipulation of physics).
This doesn't mean I think regrowth isn't possible just at the speeds Tatsuya is able to doesn't make sense.

PS: Eidos is some sort of weird magical energy that a magician uses to interfere with objects,atoms, molecules etc..

Magic is not manipulation of physics. It's reality warping with various duration, Tatsuya already explained how magic fools the laws of physics. It is better explained in the newly translated background of volume 5

Spoiler for Quote:

Information bodies meant to temporarily manipulate phenomenon-related information. These are constructed from a magician's stock psions. Phenomenon-related information are also psion information bodies, so magic sequences alter them like what computer viruses do. The [World] has the recovery strength to maintain temporal continuity, hence a magic sequence's effectiveness is only temporary. Given that fact, if sufficiently prolonged magic-induced [alteration] is kept up, it can be [established] as [reality] to the [World]. Magical therapy exploits this principle.