Potion of the Swift End

This luminescent green potion is a favored of assassins that need to dispose of targets with strong magical protections. It is fairly innocuous when mixed into an alcoholic drink or strong flavored beverage. However, it does have a tendency to tinge the beverage a variety of colours, green if it does not contain alcohol or purple if alcoholic.   The major issue with its use is that it requires a sample of the target, its efficacy is determined based on the exact component added.     5e Rulings   DC determined by added component   Fresh Blood DC 25   Old Blood DC 15   Hair, fingernail, skin sample DC 15   Bodily Fluid DC 20   When injected, target makes Constitution saving throws with Disadvantage   When ingested, Save is made normally   When afflicted, target must make Con save every minute for 25 minutes, for each failed save, the target takes a level of exhaustion   In the heat of battle, it is possible to collect a sample from a target, however, to mix and prepare a solution in the heat of battle requires an entire round's efforts, consuming movement, bonus action, action, and reaction, if you are damaged during this time, you must make a concentration saving throw as per a spell concentration, or repeat for the next round.   If administered in the heat of battle, or battle is joined after the fact, the poison works much more rapidly, the target making a Con Save at the end of each of its turns