User blog comment:FairyRaven/Fairy Tail Chapter 470: Hybrid Theory, Review and Commentary/@comment-25111584-20160125131040/@comment-25111584-20160125133639

Too short a timespan? It happened within a night, while the whole Tartaros and Tenrou fiascos took a whole day.

Or maybe he was just too far away to sense anything? His senses must have some limits, right?

Or he might not have wanted to take on 7 Dragons at once?

Or he sensed Rogue's Dragon Supremacy Magic and didn't risk it, not knowing that he cannot be controlled?

For me, the first two reasons are enough to overlook it. /o/