While Vandalblast often hits more targets, and is sometimes easier to cast, I like Spree for a number of reasons
Then, I removed Necropotence's draw-prevention ability and named it Intolerance ( Greed and Intolerance are famous silent movies)
Similarly, a player who can't lose life can't exchange life totals with a player with a lower life total
Discarding this and reanimating with the fang on turn 3 is devastating since it creates two 4/4 angels with flying and is hard to interact with
Some players argue that this is a cool thing, while others say that even though its within the rules, having access to all colors is against the spirit of the format
Then swap between activating his first two abilities, keeping his loyalty consistent