Cerberus Summoning Ritual

This ritual summons a massive three-headed dog

Procedure

 * 1) Draw a circle on the ground with charcoal
 * 2) With charcoal, write the letters "ΑΔΗΣ" at equidistant points within the circle
 * 3) Chant "Ad canis triceps deducere.  Ad canis triceps deducere.  Ad canis triceps deducere"