User blog comment:FairyRaven/Fairy Tail Chapter 377, 378: The Sky Dragon's Rage & Friends Forever, Review and Commentary/@comment-5032699-20140328123111/@comment-7418318-20140328152448

Hmm... that made me think...

Could it be possible that the Dragons are somehow hiding within people and that Porly wasn't contacted telepathically over a distance by Grandeeney, but that Grandeeney is somehow inside of Porlyuscia?

The whole vulcano background around Igneel might just have been a mental image he conjured up in his hide-out to feel more comfortable.