Icy terrain

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Icy terrain was an evocation spell learned by some beginning wizards that used cold terrain to impede their foes.

Effect
When a wizard cast icy terrain, he or she filled a small area within 50 feet (15 feet) with a thick layer of ice, which caused any creatures within the area's 5-foot (1.5 meter) diameter without fast enough reflexes to slip and fall to the ground. For the next few moments, the affected terrain impeded enemy movement.