The X/Y/Z bit is a bit bizarre, the artwork isn't quite as zany as it could've been, and the flavour text, presumably, is the actual WOTC customer service number
My initial thought was that youd put nine of these in just about any creature-heavy deck with black in it, but unfortunately they seem to be much rarer than other uncommons, and even at the end of release weekend, buying nine of these will set you back almost $90
In fact, Commander features many situations where being able to cash in your current permanents for any return is a win
Bathed in futuristic neon lights and patrolling a near cyberpunk-esque city, Miraidon hovers elegantly, joined by a nearby Daschbun
So, that's how you build a sealed deck