User blog comment:FairyRaven/Fairy Tail Chapter 371: Tartarus Arc, Part 2: Song Of The Heavenly Dragon, Review and Commentary/@comment-7418318-20140214110527

I think it'd have been better if Cana had "carded-in" the explosive Lacrima and shot it up at Cube.

Considering the size of the explosion that destroyed the guild it'd just have made a small crater into Cube, barely worth mentioning.

And then the guild could have been hit by pieces of debris falling down from Cube possibly hurting a few people either in the guild or the surrounding town.

And while the Demons were confused about how FT could possible have gotten the bomb onto cube, they notice the three Exceeds heading for them and the rest goes just the same.