Unlike lands, which can only be played once per turn, Moxen can be played in multiples, allowing for turn-one combos, early threats, and game-breaking plays
The wraiths are exiled copies of creatures in your graveyard, and thats already good enough with good ETB creatures
This card is a clear 9/10 in power level, just stopping short of a perfect 10 due to the fact that it actually can be killed
That's an amazing combat trick to copy something when attacked by your foes and then block and the Faerie to copy an opposing ground pounder like Avenger of Zendikar and then block a flyer that comes your way out of nowhere and kill it and keep your flyer is nasty
cEDH players were heavily incentivized to incorporate the Flash/Protean Hulk combo into their decks, as no other viable decks came close
Legendary Creature - Peasant Halfling Urabrask, Heretic Praetor Haste At the beginning of your upkeep, exile the top card of your library