Perfect Toxin

The pen is mightier than the sword, at least when one is writing in this ink.
When you cast this spell, you touch an object, such as the blade of a weapon, a tankard, or a door handle, and coat it in a strange and powerful poison conjured from elemental chaos. Each time a creature touches this object, the creature becomes poisoned for one minute. At the start of each of their turns, the poisoned creature can make a Constitution saving throw, ending the effect on a success.