If a source would deal 0 damage, it does not deal damage at all. Replacement effects that would increase the damage dealt by that source, or would have that source deal that damage to a different object or player, have no event to replace, so they have no effect.
June 17, 2011 · Commander 2011
If a source would deal 0 damage, it does not deal damage at all. Replacement effects that
February 4, 2011 · Mirrodin Besieged
If a source would deal 0 damage, it does not deal damage at all. Replacement effects that would increase the damage dealt by that source, or would have that source deal that damage to a different object or player, have no event to replace, so they have no effect.
October 1, 2010 · Scars of Mirrodin
If a source would deal 0 damage, it does not deal damage at all. Replacement effects that
February 1, 2010 · Worldwake
If a source would deal 0 damage, it does not deal damage at all. Replacement effects that would increase the damage dealt by that source, or would have that source deal that damage to a different object or player, have no event to replace, so they have no effect.