The choirmaster

• energy energy strike 300–520 (spell, range 7)
• fire fire ball 260–500 (ball, radius 1, range 7)
• death hymn of ruin 220–420 (around itself, radius 3)
• heal heals itself 1100–1800
• shooter keeps 4 squares away

• energy energy strike 600–1040 (spell, range 7)
• fire fire ball 520–1000 (ball, radius 1, range 7)
• death hymn of ruin 440–840 (around itself, radius 3)
• death nightmare pulse 266–532 (around itself, radius 1)
• heal heals itself 1100–1800
• shooter keeps 4 squares away

The Nightmare choirmaster (white skull) rolls again every time a group pulls the lever - one time in two hundred. Its blows and spells hit twice as hard, and a pulse of death goes round it; its drops come 3% more often; 1 Warden mark to everyone who brings it down.

• energy energy strike 900–1560 (spell, range 7)
• fire fire ball 780–1500 (ball, radius 1, range 7)
• death hymn of ruin 660–1260 (around itself, radius 3)
• death nightmare pulse 399–798 (around itself, radius 1)
• fire hellfire 600–1200 (around itself, radius 2)
• lifedrain soul drain 399–798 (spell, range 4, heals it)
• heal heals itself 1100–1800
• shooter keeps 4 squares away

The Hell choirmaster (red skull) - one mutation in ten is Hell. Its blows and spells hit three times as hard, two attacks at once, with a burst of hellfire and a drain that heals it; its drops come 5% more often; 2 Warden marks to everyone who brings it down.