Diseased Ball

You conjure up a disgusting sphere of various diseases and poisons  and either hurl it at a creature or object within range or use it as a one use melee weapon against any creature within 5ft. Make a ranged spell attack against the target or a melee attack against the target. On a hit, the target takes 1d8 poison damage. If the target is a creature it must then make a CON saving throw or be poisoned for 1 round and take 1d6 poison damage. If the target is not a creature, a 5ft by 5ft area of poison is left on the ground which makes any creature that steps into it have to make a CON saving throw or be poisoned and take 3 poison damage for 2 turns.

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).