If an instant or sorcery source you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead. At the beginning of each end step, discard your hand.
2007-05-01
If all damage from a source is prevented (because of Pay No Heed, for example) or if a source would deal 0 damage, the effect of Pyromancer's Swath will not apply as that source is no longer dealing damage.
2007-05-01
If damage is being dealt to multiple creatures and/or players at the same time, the damage being dealt to each one is increased by 2.
2007-05-01
Pyromancer's Swath doesn't change the source or recipient of the damage.