This model can hold standard size Magic: The Gathering cards (2 in x 3 in.) up to 35pt in thickness
What set is Minas Tirith Card from
So, the bottom line for the mythics is this: the value is good, probably better than most people expect, putting the set on par with Modern Masters 2017 in terms of average mythic value, but the variance is going to be problematic for people only opening a small amount of the set
Its a lord with menace, so it helps enable your other assassins freerunning costs
This will have a slant towards Commander/EDH, as that is my usual focus
If you have any means to repeat this trigger, flicker, or bounce Black Cat, you're on the road to the best side of card advantage, while your poor opponent gets severely reduced card selection