Tongue Lash

You imbue yourself with a frog-like tongue. As part of the action used to cast this spell, you must make a melee attack with your tongue against one creature within the spell's range, otherwise the spell fails. You may use your spellcasting ability modifier to make your attack. The attack deals 1d4 slashing damage to any target you choose within 15 feet of you. The target must also make a Constitution saving throw against your spell DC or be poisoned until the start of your next turn.

This spell’s damage increases by 2d4 when you reach 5th level (3d4), 11th level (5d4), and 17th level (7d4).