Doorway

A score of venom forming a line 100 feet long and 5 feet wide blasts out from you in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 8d6 poison damage on a failed save, or half as much damage on a successful one. In addition, if a creature failed it must make a Constitution saving throw, or be poisoned for 1 minute. A poisoned creature may reattempt the save at the end of every subsequent turn.

This spell pierces through all cover, and instantly destroys any structure it passes through. If at any point on it's path it passes through a door, it deals an additional 4d6 poison damage on a failed save, or half as much on a success.