User blog comment:Miskos3/Fairy Tail 522 & 523: Gray's Trump Card & Is Destiny Burning, Review/@comment-24546844-20170219132923/@comment-24102956-20170220113040

That's what I'm worried about: Erza fucking Scarlet NEVER stays down. Not even once.

The only handwave was Wendy's healing but there's a limit to it and can't actually bring anyone back to full health as she's already exhausted of her Magical reserves.

So Mashima believes that with Wendy being near to Erza, his most favored Character will never stay down even after taking all the punishment that could have overkilled her a thousand times already!