To be quite fair to Lydia, Ignis was leaving out the whole 'cavorting with and winning favor of vampires' part, which had the chance of being considerably more interesting.

"Quite," he confirmed, "as was the entity Emrakul. Granted, it was not larger than the plane itself, of course, but I imagine there was some sort of internal void sort of situation going on..."

Somewhere back on the island, Eleanor Zarrin felt her ears burning and couldn't explain why.

"...or it could also likely grow in size as it did with power the more it consumed, until it was indeed large enough to overtake everything with ease."