Miracle tends to be too swingy for many Cubes, but the cards full cost being about right makes this one a compelling consideration, assuming that there are more powerful things than casting cheap 5/5s going on in your Cube
I would still contest that, as a Commander player, it is still worth picking up a dual in your favorite color combination
If you're using Sword of Hearth and Home, you can also flicker your Knight for yet another land if someone else is ramping hard
If you want to have fun, make some personalized things, and dont really expect to take them out a lot, then you should 100% go for some DIY options
Weve already seen the Behold mechanic spoiled for Tarkir: Dragonstorm, which cares about Dragons in hand, so this ability should prove extremely relevant alongside that
By phasing creatures in and out of the normal timeflow as needed, he figured he could make summoning and controlling them more mana-efficient