An ancient race of nearly-humanoid spiders that have lived on the fringes of civilization for as long as recorded history.

"AAAAAAHH, it's a troll!"
"Protect the women and children! Grab your torches!"

"AAAAAAHH, it's a troll!"
"****head... we banned him five times and he keeps making new accounts about how he pwns all and that he>>>>>>>>>>>>>>>>>>>j00!"

also known as a great goblin, dread goblin, or super goblin

The Karkos represent an attempt to create a bad guy race with almost no redeeming features, a true villainous species without resorting to established tropes or handwaving.

Hell Hags are thankfully rare, incredibly rare, and the appearance of one means that the world has net decreased in number of hags by two

Behold, a magical pig

A horde of devious, ferocious, tenacious, and atrocious creatures, beasts, and monstrosities to populate the northern realms of your fantasy. Get them while they're cold!

Appearing as mutilated humanoids with large heads, Nihilids are terrifying to encounter. They are thankfully rare.

Seven Mermaids, some of them living their lives in the deep ocean, others, willingly or otherwise, on the land.

Youth passes quickly for this race of elves, though middle age lingers for millennia. They have no love for the forests or other natural places, preferring their carefully crafted and tended walled cities.

The powerful barbaric spawn of The Panther God

Freetext Friday barbarian (but mostly because I can't sleep)

The two of them peered down at Erath menacingly through the trees. He rested his palm on the jeweled hilt of his sword, ready to cut one of them down the moment they touched the ground. With any luck, he could swing quickly enough not to find a dagger in his spleen. What he wasn't expecting was the sharp, discordant noise behind him. Whipping around, it was a third creature, gripping a violin in its spindly, sinister hands. Sweat still beading down his forehead, Erath looked down to the poorly scrawled sign at its feet, reading: 'Will pley 4 gold.'

The common Dragon is seen as a Monster and a Beast; whether that is true or not, is an entirely different matter.

Satyrian, commonly known as the Satyr.

The Neko, or Cat-Girl; as they are also known as.

The name was chosen, in order to disassociate from the cosplay Cat Girl of Batman.

With no given form, she can take on the persona of choice at will.

After the horrors of the Scranja war, Humanity found itself in a predicament that it had not faced since well before the birth of civilization. Scattered to the solar winds, and very nearly the victim of genocide, many of the isolated pockets of mankind faced population bottlenecks, and the possibility of failure from inbreeding. The Synthmen were a part of the solution.

A most useful race - if one can get past their appearance, and avoid being eaten...

The immortal dwarfs of Damor

Gives life to the notion of no good deed goes unpunished.

Nod to Gossomer, for her Solomon Grundy forum post, my inspiration

500 Word NPC challange