+1 to increasing save DC
Treat it as being poisoned repeatedly by the same poison, each increasing the DC of the original poisoning by 2, but not increasing its effects. Meeting DC would stop all of the negative effects of missing the save.
+1 to increasing save DC
Treat it as being poisoned repeatedly by the same poison, each increasing the DC of the original poisoning by 2, but not increasing its effects. Meeting DC would stop all of the negative effects of missing the save.