This is a cool deck! This may seem very minor, but you should consider one problem with this deck... When playing in groups of three and beyond, you have to consider the fact that nothing, nothing can
aggravate a mtg player more than destroying their lands, other than countering a really high mana-cost creature. This deck destroys lands to set back the opponent, and then kills slowly by using sorceries to power up
Magnivore, which has the potential to become a 20/20 creature in this deck. So keep in mind that in a multi-player deck, this deck will be the most-targeted deck among the players. After all, nothing unites more than the common enemy.