The difference between Brainfreeze (storm) and Grindstone is that Brainfreeze gets "copied" for each cast spell that turn. Grindstone repeats the process (string) if both cards share 1 color. This means that a Gaea's Blessing stuck in a Grindstone will get milled untilll the deck is in the graveyard, if you then T-Crypt the graveyard the Blessing will get removed before it resolves.
This decision took place in my match versus the Imperial Painter, after that I sided the Blessings out.
Bolt Painter, as a reaction Grind the deck and then T-Crypt it while the deck is on the stack on its way to the grave. Then the Painter dies.