Its an interesting strategy if he can manage to play some control in the four- to six-mana phase of the game, get going in the seven- to nine-mana phase, and then just crush after that
Starting with the nasties, we've got Maleficent, Monstrous Dragon
If you do, put that card onto the battlefield and all other cards revealed this way into his or her graveyard
Comeuppance and Teferis Protection, or the new Galadriels Dismissal will see you escaping most assaults
You should buy whatever Challenger Deck you will have the most fun with, but my advice is to avoid Fires Friends unless you really like the playstyle of the deck
5 Essence Flux For the record, Essence Flux is just a better Cloudshift