Death Snare

In the eastern swamps on the plain of death holds one of the deadlist plants in all the worlds in the Devil Snare. This thorny vine can be called upon by poweful spellcasters to ensare their enemys in thorny trap. 

As a bonus action make a spell attack any creature that is in the 5 ft square around where the attack is made must make a dexterity save or be restained and take 1d8 damage. On a succesful save you are not restained and take half damage.

On each successive round after being captured the affected creature must make a strength check or continue to be restrained. If a creature fails it takes the full damage. If it succeds it is no longer restrained and takes no damage that round.