Gerbalaine

Gerbalaines are a race of very small fey beings. It has a mouse-like appearance, and because of its size it is often mistaken for a common field mouse unless examined closely. A gerbalaine is a tinkerer, using small bits of materials gathered to fashion its home; it often builds within walls, under floors, or otherwise right under the noses of big folk. Up to 3 times per day, a gerbalaine may magically assume a larger form, growing to approximately Halfling size. It is this form that gives the above statistics when pressed into a fight, although a gerbalaine is more likely to run away than fight. When in its natural mouse-size form, a gerbalaine has effectively only 1 hp, but is very difficult to hit (AC 22). A gerbalaine who saves (with Halfling bonuses) against an area-of-effect damaging spell takes no damage, and even if the save fails takes only half damage. A gerbalaine's skill with devices is comparable to a 10th-level Thief.