Forum:Why was Exchange of spirit forbidden?

I mean, now it's clear that this card must be banned, because lightsworns can fill up the graveyard with 15 cards pretty quickly, but before they were released, why was it banned? I think there are not too many cards that allow self milling barring lightsworns, so I don't see any reason that this card was banned previously to their release.

80.103.66.222 19:55, September 13, 2009 (UTC)