The Nightmare Beast

Boss

Damage taken

physical -20% fire -35% holy -15% (minus = it takes less damage, plus = more)

Immune to

invisible paralyze

Loot

Item	Up to	Chance
collar of blue plasma	1	6.5%
ring of blue plasma	1	3.2%
ring of green plasma	1	16.1%
ring of red plasma	1	9.7%
collar of green plasma	1	9.7%
collar of red plasma	1	12.9%
enchanted sleep shawl	1	2.8%
red gem	2	41.9%
abyss hammer	1	2.8%
arcane staff	1	3.1%
beast's nightmare-cushion	1	3.8%
berserk potion	9	16.1%
blue gem	1	6.5%
bullseye potion	19	32.3%
chaos mace	1	10.4%
crystal coin	3	22.6%
dark whispers	1	3.2%
dragon figurine	1	7.6%
energy bar	1	91.5%
giant emerald	1	1.9%
giant ruby	1	6.5%
giant sapphire	1	2.8%
giant shimmering pearl	1	9.7%
gold ingot	1	16.1%
gold token	1	64.2%
green gem	1	19.4%
huge chunk of crude iron	1	38.7%
ice shield	1	9.7%
magic sulphur	1	8.5%
mastermind potion	18	12.9%
mysterious remains	1	93.4%
transcendence potion	18	12.9%
piggy bank	1	100%
piggy bank	1	94.3%
platinum coin	9	100%
purple tendril lantern	1	6.6%
ring of the sky	1	4.7%
royal star	193	48.4%
silver token	4	98.1%
skull staff	1	12.9%
soul stone	1	4.7%
supreme health potion	29	58.1%
turquoise tendril lantern	1	7.6%
dark vision bandana	1	4.4%
ultimate mana potion	29	64.5%
ultimate spirit potion	24	58.1%
violet gem	1	6.5%
yellow gem	2	45.2%

Base chances of the creature; the server loot rate applies on top.