This trap is triggered whenever someone good (GM's discretion, but definitely includes clerics and holy warriors of good deities) passes within 20 yards of the trap.
Detect: Per-based Thaumatology, or Perception + Magery for mages, at -6.
Circumvent: Automatic (don't within 20 yards of the trap).
Evade: Will at +1.
Effects: Anyone who is not evil is at -1 to DX and IQ for 1 hour for each point by which he missed the resistance roll.