Putrefying sphere

Primary action. Does not provoke. 5' radius sphere floating just above the ground, range 50'. Concentration. This black sphere has uncertain edges as though its own darkness is pressing out at the edges- tentacles and tendrils can be seen licking at the air just on the edges of the sphere. You can move the sphere in a straight line, no more than 15' per round. Anyone in the path of the sphere makes an AGL check to avoid, otherwise the sphere consumes them, doing 6D6 spectral damage and 4D6 crushing damage.