This spell can be cast upon an enemy unit, even if engaged in combat, that is within 12" of the caster or within 12" of a river, stream, bog, or any other water feature on the tabletop that has been identified as such before the game. If successfully cast, the ground beneath the unit is temporarily turned to swamp and the unit moves at half speed until the end of its own following turn. If forced to flee/pursue, for whatever reason, the unit flees/pursues at half speed (roll dice as normal based on the unit's normal Move value and then halve the result). This spell has no effect on flyers or ethereal creatures.