YOu have to make two just in case. Logically: you're gettin bitten god knows how many times, I'd think 2 rolls is lenient, you could be making them until you get out of the pit, but Zaer's being nice I think.<br/><br/>the dual roll is basically to double check. Just because you make the first one doesn't mean the poison isn't still in your body. It may afffect you in the end (hence the secondary roll) the first is you intial reaction (doe syour body immediately react negatively?) the second is your "immune system" (does it fight it off or destroy it for good?) I think. I could be wrong