conjuration earth 

Traditions primal

Cast [>>>] material, somatic, verbal

Range 60 feet; Area 20-foot burst

Duration 1 hour

Long, sharp spikes of solid rock thrust up from the ground in the area. The area becomes difficult terrain and hazardous terrain.

A creature that moves on the ground through the area takes 3 piercing damage for every square of that area it moves into.

Heightened (+1) Increase the damage by 1.

Advanced Player’s Guide, page 225.