Fire Of Entanglement

The material below is Open Game Content from a 3PP Source

Fire of Entanglement
School evocation; Level paladin 2
Casting Time 1 swift action
Components V, S
Range special; see text
Target one creature
Duration 1 round/level
Saving Throw Reflex partial; Spell Resistance yes

The next creature you attack using your smite evil class ability is wreathed in flames that impede its movement. Until the end of the spell’s duration, the target is entangled. If the target starts its turn in a square adjacent to you, it is considered to be entangled to an immobile object (you) and cannot move. A target that saves against this spell is affected for only 1 round.