Dissension — Uncommon
Pain Magnification rulings:
5/1/2006 : This triggers only if all 3 or more damage is dealt at the same time. It doesnt trigger if damage that adds up to 3 or more is dealt at different times by the same source.
5/1/2006 : If a source deals 3 or more damage to multiple opponents at the same time, this ability will trigger once for each of those opponents. They will each have to discard a card.