Caved wyvern

The caved wyvern is a large, snake-like wingless dragon that lives in the Wyvern Cavern. It is highly deadly, toxic, as well as having an aggressive temperment.

Physiology
The caved wyvern is, to the untrained eye, nothing more than a glorified snake. However, it is actually a Draco Familias (that's dragon to you and me), and in the sub-class Draco Wyvern (which, unsurprisingly, is a wyvern). Their scales are a lime green color, as are their teeth and eyes. They're venom is also green, and highly bio-acidic, death is a sure thing, with no known cure. Their fangs measure at an impressive half a foot, which are constantly being replaced. It has a bright red tongue, which is one feature that distinguishes it from snakes: The caved wyvern actually uses it's eyes, while the snake "sees" with it's tongue by use of the Jacobsons Organ.

Abilities
Defensively, the caved wyvern is lacking proficiently. The best it can do is the ancient Chinese proverb, "a good offense is the best defense". It strikes before you can with its poisonous jaws, and its whipping tail. A highly toxic saliva means that the head is best avoided, while strong and streamline scales mean blades are useless. Axes and warhammers are recommended. If you are trapped near its head, its best to use slashing weapons, such as the blades. It can either hold its breath for an excessive amount of time, or can breath underwater. It is best not to go near a pool where a caved wyvern has ever been, as it is likely to be highly poisonous.

Always drops:

 * 700gp
 * Fangs
 * Scales

99-80%:

 * Scale Shield
 * Eye of Wyvern

79-65%:

 * The Blue Blade
 * Brilliant Boots
 * Shining scepter

64-48%

 * The forgotten ring
 * Wyvern fangs
 * Scale Dagger

47-23%

 * Viper Bow
 * Cobra lance
 * Serpentine Axe

22-10%

 * Caved Warhammer
 * Vial of Caved Wyvern Poison
 * Dragon breath
 * Blade of steel

10-2%

 * Boots of fleeting victory

1%

 * Scaled Blade