Mutable Realms has updated the official bestiary with another new creature - the "Sprite".  Here is some info about this new addition:

"Generally, sprites are harmless and intelligent creatures, preferring to dance and frolic in beautiful but isolated places. On occasion, however, some unfortunate person or creature dares to threaten their revelry and a sprite's aggressive side comes out. Despite their frail appearance, sprites are impressive combatants, particularly against those who are not prepared for their quick and subtle ways. Many a brutish barbarian has been humbled by the darting movements and startling magic of an angered sprite. Fortunately, sprites rarely hold grudges and once they feel their lesson has been taught, they will often flit off and leave their target harried but without serious harm." -Kitterwen

For more information, visit the official site at this link.