Rather than writing everything out, using multipliers, and doing all of the stuff we do for the article, you can simply add up the total value of all the mythics in the set (in this case, roughly $115), divide by the total number of mythics in the set (generally 15 but sometimes slightly different Throne of Eldraine has 15, which would give us $115.05 / 15 = $7.67) to get the average value of a mythic rare, and then finally multiply by the number of mythics you'll get from an average box (here's a cheat sheet: the average box as 4.5 mythics, 31.5 rares, 108 uncommons, and 360 commons)
If the active player passes priority and the nonactive player also does nothing, then it will be too late to go back and cast your Awaken the Bear
Arguably the most popular deck sleeve that youll see are the Ultra Pro brand
You've seen what the system is
It can be used to protect your own creature as well as to recycle good ETB triggers from cards like Mulldrifter, Solitude, Fury, you name it