Hopefully, you can do something explosive with that mana, like playing huge threats a la Garruk, Caller of Beasts and Kalonian Hydra, quickly
(This prevents pack weighing on the aftermarket.) So it's unlikely packs with improper weights would have left the factory floor, let alone on a scale large enough to impact the entire print run
You can effectively retrieve three or even four cards in a single turn, depending on how many copies of Puzzle of Time you have in your hand
Gruul Charm deals 3 damage to each creature with flying
However, if the aura has the bestow ability, it becomes unattached, stops being bestowed, and remains on the battlefield as a creature
Magic: The Gathering Fit MTG Card Sleeves with a Doctor Who Flair For Magic: The Gathering players, protection is paramount