Hail of Arrows Snare

When a creature enters the snare's square, it releases hundreds upon hundreds of carefully prepared arrows, blanketing a @Template[emanation|distance:20]{20-foot radius} around the snare's square with massive arrow fire that deals 18d6[piercing|options:area-damage] damage. Creatures in the area must attempt a reflex|showDC:all|dc:37|basic|options:area-effect save.