As long as Frodo is your Ring-bearer, it must be blocked if able
Out of these three, each has a balance keeping them from being auto-includes
Explore is less reliable but more relevant in the late game
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)
Exalted Sunborn is a great variant on this effect, attached to a creature that could be cast temporarily for two mana
If you could dust, youd be able to get rid of the copies that you dont need and keep your favorite art