* DemonicSpiders: ''Loads and loads'' of them. Zephyr Hounds, Quylthulgs, Drolems (the reason you ''never'' go below 2,000 feet without poison resistance), Ancient Multi-Hued Dragons, etc.
** "It moves [[LightningBruiser very quickly]]"
* GameBreaker: Like in most roguelikes, being fast. The most dangerous monsters are those that can hit you 5 times each time you move.
* GoddamnedBats: Oozes, icky things, mushroom patches, and worst of all, worm masses.
** Zephyr Hounds. Almost any time you see a "Z" on the screen (the earliest ones--Clear, Dark, and Light--are the sole exceptions) you'll want to cry.
* GoddamnedBoss: Smeagol. Wormtongue to a lesser extent, as he is actually threatening.
** Any boss that summons. Especially when those summons can (and do) summon.