Level: Druid 2, Ranger 2
Components: V, S, DF
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Area: One 10-ft. square/level (S)
Duration: 1 hour/level
Saving Throw: Reflex negates; see text
Spell Resistance: No
Trip vine causes plants within the area to grow together to form a tangle. Any creature entering an affected square must succeed on a Reflex save or fall prone. Any creature charging into an affected square takes a –2 penalty on its saving throw.
If this spell is cast on an area of undergrowth, saves against the spell take a –2 penalty.
Source: Heroes of Battle, page 128.