Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
The entire area is bathed in a sickly purple light.
Every creature in this place is protected by an unholy aura, giving them +4 deflection bonus to AC and a +4 resisteance bonus to saves. Creatures cannot be possessed or magically mentally influenced. Creatures gain SR 25 vs. good spells, and spells from good creatures. And a successful melee attack vs the creatures requires a DC 27 Fortitude Save or the attacker takes 1d6 Strength damage.