First off, Sorry if this has been covered elsewhere but I had no luck finding it. My question is mainly in reference to "Shadow warriors" if I'm not mistaken (don't have cards in front of me) but the card reads something like "at the start of your turn opponent assigns 1 damage to a unit in their battlefield" (or something to that effect). If I have multiples of that card in play and my opponent has 1 unit with Toughness 1 is he able to cancel both due to the fact that they are dealt from different sources/2 separate effects or does this in fact create a pool of damage to be assigned similar to combat in the battlefield phase and thus allow him to only cancel 1 of the 2 points being assigned to the unit.
Thanks for your responses.