Straight outta Oakhurst
Retail Price: 900gp
1 lb black disk, 8" in diameter, w/ raised humanoid skull, surrounded by runes and sigils (flat on reverse side).
Can be activated by proximity or timer.
Any creature which steps on this disk, or flies 5’ or less over it (when it is in proximity mode), causes activation, which does 5d6 fire damage to all creatures within 10’.
(also provides a -2 save penalty)