Cash Cow (3.5e Monster)

"Abner...that cow's hide looks ta be made o' Platinum..."

Cash Cows appear to be regular cattle whose hide has a somewhat metallic sheen. When killed they may are usually dissected, as many of their organs are precious metals. It's uncertain exactly how they came about, but an insane mage is assumed to be the case as usual. Someone wanted cattle that could eat earth and raw ore and poop refined metals. He got it, but in the process they convert so much of the stuff that their insides slowly become metal. They are the same size as normal cattle but weigh twice as much.

Combat
Preeetty much the same as your standard cow really...

Stampede: A frightened herd of Cash Cattle run in a random direction, literally running over anything Large or smaller. Anything in their path takes 1d12 damage for every 5 cattle in the herd (Reflex Save DC 17 for half damage, Save DC is Strength based).

Trample: Reflex Save DC 17 for half damage (Save DC is Strength based).

Valuable: Cash Cattle are pretty much inedible, and so is their milk. However if fed raw ore they can 'refine' it into a purified state (a full grown cow can 'process' 2 pounds of raw ore per day). Fully mature cattle are worth about 5 GP per pound (and weigh up to 2000 pounds) dead, but quite a bit more alive.