Ensnaring Strike

1st-Level Conjuration
Casting Time: 1 bonus action
Range: Self
Components: V
Duration: (C) 1 minute

As in the Player's Handbook with the following added:
  • This spell only requires concentration while a creature is Restrained by the spell, but the spell ends early if you cast it again or cast another smite spell, such as shackling smite or lightning arrow.

Source: PHB 237