One-line villains

[JimAde]

A powerful elf mage from another dimension seeking to gain technology from the United Federation of Planets to conquer his homeworld.

A shapechanging assassin with the ability to create bio-weapons from his own body (supers campaign).

 

[The Grumpy Celt]

A petulant wizard who has vowed "terrible revenge" on the community that banished him after he accidently summoned - and lost control of - a colossial, legendary, dire (enraged) flumph over the city on laundry day.

 

[Graybeard]

A human Bard/Sorceress seeks vengeance on all adventurers because she was left for dead by her party.

 

[diaglo]

"No, Mr. Bjorn," the bald gray skinned dwarf snarled. "I mean to kill you."

 

[Mark Hope]

An intelligent cactus psion who masterminds a network of psychically aware plants in an effort to achieve global domination. Phear the Doomspike!

 

[Bran Blackbyrd]

A craven but dangerous one-hundred-fifty year old, human thief who prolongs his misbegotten life by any means necessary has evaded those who seek to destroy him and his wickedness by escaping to the prime material plane where he plans to continue traveling in disguise whilst lengthening his lifespan through draining the life-force of others and the gathering of powerful magic items.

EDIT: BTW, Cool idea!

 

[Henry]

A self-indulgent Suel Lich, escaped from Greyhawk, seeks to destroy the adventurers who are his only serious opposition to dominating the continent on which the campaign takes place.

An Experimental Psionic Warforged decides that life is meaningless after the Last War, and instead of suicide seeks to use the Mournland in a magic ritual to obliterate the planet of Eberron.

 

[Clueless]

A walking ego of an arcanaloth, black furred and black hearted, with high expectations and low standards in girlfriends.

 

[birdchili]

an illithid who draws power from disease and parasites, seeks to return now human-inhabited lands to the swampland they were before the last world cataclysm using "tears" in the prime material to the planes of water and ooze.

 

[Joshua Randall]

A disgusting druid of the god of pestilence and decay, who uses poisons and biologically engineered diseases to wipe out all those who are not racially pure.
[ My players hated this guy with a passion. ]

A tall, sunburnt, raspy-voiced ranger/assassin kitted out with numerous defensive and movement-based magics that allow him to cheat death time and again.
[ This guy survived a half-dozen encounters with the PCs before they finally slew him. ]

A ruthless, amoral dragon-hunter who manipulates the PCs into helping her locate the lair of a good-aligned dragon.
[ OK, I ripped that one off from Dungeon magazine, but it's still sweet. ]