Hey, it's a 5 diff, 4 dmg attack that flips a 2... It's not THAT good... /sarcasm
I don't think we should bust out the RAGNAR BANHAMMA on I-Spin just yet. Try getting through Earth 's wall without it if you're Air . All of a sudden, it gets a whole lot harder, for all 3 symbols. I-Spin is a way to compensate for a building disadvantage/punch through a very solid wall. Ironically enough, I-Spin discourages grey wars (up to a certain extent), because it's a card that can be passed on T2 easily, and punishes the opponent for hiding behind a wall of foundations.