There are plenty of things to do with infinite mana, and in the meantime, you can activate its third ability to head to AskUrza.com and get a random effect
David Rood "Experience is the best teacher" is a maxim that holds true in many things, and Magic: The Gathering is among them
You can utilize Xenagos to great effect by letting your biggest creatures swing on out at an opponent as soon as they come into play, being particaully good when used with creatures that have strong attack triggers or ones that will undoubtedly be targeted immediately by your opponents
Circle of Power AND Resentful Revelation This Black duo of sorcery speed and then getting two cards total is here
Except heres the kicker: The Reactor Raid adventure actually draws you three cards, not two
The deck has decent card draw and removal, though in a heads-up match against the rabbit menace, it could struggle dealing with go-wide token-makers like Hop to It