Wyvern

• earth poisoned bite 8–24 (spell, range 1)
• earth poison wave 30–90 (wave, range 7)
• heal heals itself 45–65

• earth poisoned bite 16–48 (spell, range 1)
• earth poison wave 60–180 (wave, range 7)
• death nightmare pulse 80–160 (around itself, radius 1)
• heal heals itself 45–65

A Nightmare wyvern (white skull) comes back one time in two hundred - when it respawns, or rising where one just died. 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.

• earth poisoned bite 24–72 (spell, range 1)
• earth poison wave 90–270 (wave, range 7)
• death nightmare pulse 120–240 (around itself, radius 1)
• fire hellfire 180–360 (around itself, radius 2)
• lifedrain soul drain 120–240 (spell, range 4, heals it)
• heal heals itself 45–65

A Hell wyvern (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.