Dionea's Grasp

A large Venus fly trap sprouts out of the ground. The target will have succeed on a Dexterity Saving throw, on a failure they will swallowed by the Plant dealing 2d12 piercing damage, then dealing 15 Acid Damage every 2 rounds, Once a target has been swallowed the plant will grow in size. This plant has 10 health points. 

for every cast at a higher level this creature will gain 10 more health points.

At Higher Level

When you cast this spell using a spell slot of 4th level or higher, the initial damage and the damage dealt at the start of the grapple each increase by 1d8 for each slot level above 3rd.