Shade
Monster Junkie
Hmmmm. Maybe don't change the crit multiplier or threat range but allow it to gain bonuses on special attacks (like trip, etc) for imitating appropriate weapons?
If we're going with the latter, I wanna use the former.
The way I see it, we can take one of two approaches:
Malleable Form #1 (Ex): A busen can reshape its body into many shapes, although it always occupies the same volume and has an oily black skin. For example, it can grow large ears to give itself a bonus on Listen checks. A busen can use malleable form to grant itself a +x racial bonus on Balance, Climb, Escape Artist, Jump, Hide, Intimidate, Move Silently, Listen, Search, Spot, Swim, or Tumble checks. Malleable form can grant a total racial bonus of up to ++12, but no more than +8 in any one skill.
A busen may also change the form of its natural attacks to take the general form of any manufactured weapon. The natural attack gains the damage type (bludgeoning, piercing, or slashing) of the imitated weapon, but no other features of that weapon. Regardless of the damage type, the natural attack damage is always the same (1d10 hp for a standard busen).
It requires a full-round action [?] for a busen to change from one form to another.
Malleable Form #2 (Ex): A busen can reshape its body into many shapes, although it always occupies the same volume and has an oily black skin. For example, it can grow large ears to give itself a bonus on Listen checks. A busen can use malleable form to grant itself a +x racial bonus on Balance, Climb, Escape Artist, Jump, Hide, Intimidate, Move Silently, Listen, Search, Spot, Swim, or Tumble checks. Malleable form can grant a total racial bonus of up to ++12, but no more than +8 in any one skill.
A busen may also change the form of its natural attacks to take the form of any manufactured melee weapon (longsword, spear, etc.). The natural attack gains all traits of the weapon, such as the damage type (bludgeoning, piercing, or slashing), critical threat range and multiplier, bonuses on disarm and trip checks, and so forth. Regardless of the weapon emulated, the natural attack damage is always the same (1d10 hp for a standard busen).
It requires a full-round action [?] for a busen to change from one form to another.
I, of course, prefer #2.