Aboleths.
*shudder*
After nearly losing one guy to an aboleth in my
nice DM's game, I was understandably concerned when things started to look like we were moving toward an aboleth encounter in my
tough DM's game.
First there was the illusion of a cave-in. (Metagame thought: hmm, we've just come through a watery tunnel, we're deep underground, illusions... hmmm....)
Then my char & the other rogue snuck ahead & saw a large natural lake. At this point we moved from metagame thoughts to metagame muttering... 'Oh sh*@, oh sh*@, oh SH*@!'
Then the other rogue, who my character knew was PHOBIC of water, started calmly walking toward the lake...
In game: HELP!!!
/ooc: Continue frightened muttering throughout the entire combat.
What was especially funny was that none of the other players had the slightest idea what we were fighting -- but their characters made their Will saves to see through the illusion of an empty lake & see the thing. I knew what we were up against even before we got to it, but my char was the last one to make his Will save & actually see the thing, lol. Turns out it was half-fiendish, because a normal aboleth would just not have been scary enough...
*blink*
Anyway, TPK. /mourn level 10 CN rogue/fighter/assassin, one of my fav chars ever; he was modeled on Anita Blake, Vampire Hunter crossed with Van Helsing. *sigh*
The good news is that the DM let me bring in my retired level 2 barb from another campaign who is one of my other top 3 chars.
Things that can dominate you, leave you to drown in AIR, & never even let you see what the heck you're fighting... yup, that pretty much meets my idea of scarey.