Tongue serpents

The caster’s tongue becomes a little bit powerful serpent that may spit venom up to thirty feet away as an action. The caster may perform either a spit, or melee attack as part of the casting of the spell— using the caster’s spellcasting modifier and dealing one point of piercing damage, and 1d6 poison damage; which requires a Constitution saving throw, or become poisoned for one minute.

The caster may may create one additional serpent for every level that they upcast. 
At the end of the spell’s duration, the serpents become bloody bits of organic matter.