Cow Sniper (3.5e Monster)

You see a vaguely human-like cow, walking on its hind legs and carrying a large crossbow, take aim at you.

A cow sniper is a type of cow that uses a heavy repeating crossbow and uses stealth to attack enemies.

Combat
Sudden Strike : If a cow sniper is able to catch an opponent who is unable to defend himself effectively from attack, it can strike a vital spot for extra damage. Whenever a cow sniper's target is denied a Dexterity bonus to AC (whether the target actually has a Dexterity bonus or not) the cow sniper deals an extra +4d6 damage of damage on an attack. This increases by +1d6 every 2 HD the cow sniper is improved. With a ranged attack, this bonus only applies against targets up to 30 feet away. Creatures with concealment, without discernable anatomies, or immune to critical hits are immune to sudden strike. A cow sniper can't use sudden strike on the limbs of a creature whose vitals are out of reach.

Improved Hide in Plain Sight :  A cow sniper has the Hide in Plain Sight ability, and whenever it uses that ability, the cow sniper is treated as invisible towards any target it attacks, meaning Sudden Strike damage is added. See Invisibility does not stop the effect, and only effects that can defeat Hide in Plain Sight stop it.