Envenom

Holding a container of poison, you transfer it directly from the container to the internals of a creature you can see within range. The target creature must make a Constitution saving throw. On a failure, the effects of the poison occur as though it was ingested or applied by a weapon attack, and any initial saving throw failed. On a success, the poison remains in the container used to cast the spell, but spoils in its entirety, rendering it permanently ineffective.