Veserick's horrendous flatulence

You point at a target you can see within 100 feet from you and cause them to empty their bowels on the spot, creating a 25 foot sphere of noxious gas around them. Any creature that starts it's turn within the radius must succeed on a constitution saving throw or become poisoned for 1 minute. A creature affected by the gas takes 2d4 poison damage at the start of each of it's turns and can repeat the saving throw at the end of each of it's turns, ending the effect on itself on a success. The gas remains for 3 rounds before it dissipates.

• A creature that does not need to breathe to survive is unaffected by this spell, although it may still be targeted by the spell to create the area of gas.
• The gas can be dissipated early if a spell such as Gust or Gust of Wind  or similar magic is cast at its center.

Casting this spell with a spell slot of 3rd level or higher causes the gas to remain for 1 additional round for each spell slot level above 2nd.