Toxic Lash

You lash out with a length of rope like a rope dart, partially and momentarily transforming the end of it into a venomous snake that attempts to bite a target at the apex of your swing. Make a melee spell attack against a target within 15 feet of you. On a hit, the target takes 3d10 poison damage, and must make a Constitution saving throw. On a failed save, the target becomes poisoned for 1 minute and loses its resistance to poison damage if it had that resistance, or becomes vulnerable to poison damage if it didn't. This spell does not affect constructs.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, select one of the following options:

• The damage of this spell increases by 1d10, and the range at which you can make your spell attack increases by 5 feet for each slot level above 2nd.
• The target loses one additional random elemental damage resistance from among those it has for every 2 slot levels above 2nd.

When casting this spell at 5th level or higher, a creature loses immunity to poison damage and the Poisoned condition, and becomes resistant to poison damage instead, in addition to the previously listed effects.