Talk:Kamijou Touma/@comment-25095509-20140707034537/@comment-175.142.84.237-20140709100131

True that there are some who mentioned that IB is incomplete(iirc: Terra said it's should extend more than only his right wrist). So it might be that a part of IB is being used up. Probably to seal IT or Dragon. But if you're talking about the basic/usual IB form that Touma has been using throughout the series, then it has been pretty much the same, not stronger nor weaker.

The power of Fiamma's 3rd arm is dependant on the threat or danger he faces.

What makes IB seem stronger or weaker is also dependant on the nature of the supernatural power it faces against. i.e. Kamijou can handle a powerfull magical attack that could blow away a planet but couldn't a magical bullet that is made up of 2 Billion simple spells.

''“And if you have never prevented a threat that could end the world, you have never been blessed with a chance to draw out power great enough to save the world. It’s the same as how my Imagine Breaker doesn’t look like it has any power unless I’m surrounded by espers or magicians.”  ''- Kamijou Touma (Volume 22 - Chapter 10 Part 3)

tl;dr: Basic IB doesn't change it's power levels regardless of the danger he faces.