Completely out of the blue i just recalled something

Since the first 2 lines in the riddle apparently don't refer to the lifestream and you use the world breathe, if one were to take that literally the first time you go junon, when you're down in the beach helping Priscilla and that silly ass boss appears, and you kill it with ease, you have to do CPR to the girl(there goes the breathing life in line) and she rewards you with the shiva summon for saving her

about stopping a giant mastered within i guess you could be referring to the junon cannon since after all that thing is pretty huge like a giant and it can be mastered from within since you do require all sorts of engineers to build it and maintain it


just another odd guess but the next two verses:

Cause beginning of life to come to an end,
Life’s story told in a place to mend.

since Mideel have been rules out, Midgar the same, Temple of the ancients doesn't seem like it since you didn't confirm it right now only place that can somehow be related to this would be Corel at the time of the fire by shinra troops which also happens to be related to Barrets life story(after all he does tell you a bit about it in a cutscene)


this will probably be the most far fetched idea ever:P

Over an unwelcome touch a kind of storm,
Use surer feet or land deformed.

If one assumes this part is passed during that snowboard thing and that valley of Ice or whatever its called(haven't played through this part in ages), the unwelcome touch could be that part when you need to go touch that unclean spring if memory serves me right and then touch the man back(the kind of storm reference) so that you could attack him or attack Alexander to get the summon.

The use surer feet could easily be during the snowboarding mini game:P
Anyone with a couple of brain cells would prefer to land correctly especially when snowboarding down a huge mountain then to fall and land deformed


those are just a couple of random ideas that came to me all of a sudden:P