Whirling Blades
Trap
Level 5 Obstacle
XP 200

Blades rise out of hidden compartments and spin wildly across the chamber.

Trap: A whirling blades contraption emerges and spins like a top, moving its speed in a random direction and attacking each round.Perception     DC 22: The character notices trigger plates around the chamber.     DC 27: The character notices the hidden control panel.Initiative +7          Speed 4TriggerWhen a character moves into a trigger square, the whirling blades contraption emerges and attacks.AttackStandard Action      Close burst 1
Targets All creatures in burstAttack: +10 vs. ACHit: 3d8 + 3 damage.Countermeasures     Thievery DC 22: A character can engage in a skill challenge to deactivate the control panel. Complexity 2 (6 successes before 3 failures). Success disables the trap. Failure causes the whirling blades to act twice in the round (roll a second initiative for the trap).
     A character can attack the whirling blades contraption (AC 16, other defenses 13; hp 55; resist 5 all) or the control panel (AC 14, other defenses 11; hp 35; resist 5 all). Destroying either disables the entire trap.

Published in Dungeon Master's Guide, page(s) 89.