Basically, any trope that acts as though X is unbelievably awesome. It can move mountains, or you might be willing to move mountains to get it. It's just that good. Behold the power of X!
Not to be confused with index of Power. Not necessarily related to the power of the character named Index in To Aru Majutsu no Index.
The following 25 pages are in this category, out of 25 total.