You create a spear made of tightly wrapped vines, of the same species as the vine used as the component, and make a ranged spell attack against a target within range. On a hit, the target takes 2d6 + your spellcasting modifier piercing damage.
Also, if the species of vine used in this spell is poisonous, the target takes an additional 1d6 poison damage and must succeed a Constitution saving throw or be poisoned for 1d4 + 1 rounds (effect ending at the end of your turn on that round). If the vine used is paralytic, the target must succeed a Constitution saving throw (use same saving throw for poison) or be paralyzed for 1d4 + 1 rounds.
The spell's piercing and poison damage each increase by 1d6 when you reach 5th level, 11th level, and 17th level.
* - (small piece of a thorny vine (briar, thicket, etc.))