Silver Beastcoin  

You can steal beastcoins off of all non-ranger goblins.

Beastcoins can be stolen from all lower level humanoids characters.

Silver beastcoins can be stolen from Valkurm type Goblins (leechers,muggers). They can also be stolen from all the monsters that drop kazham keys. (Yagudo Votary, Orcish Cursemakers, Old Quadav, etc.)

Mythril Beastcoins, so far I've only been able to steal these from Goblin Reapers and Gobling Robbers, but I am sure there are others you can steal from.

REMEMBER! Don't steal from the ranger type gobs, you will only get one crudy arrow.

I get to make about a stack of these a day, and they sell for anywhere from 4k to 5k on bahamut. Not too shabby at all.

i got these stolen off the 9 beastmen you hunt for the kazham keys. ex: Yagudo Voltare. or Orcish Cursemaker.

you can also steal them from the Goblin Smitty leveling in Kazham.

Stolen off of Leechers, Muggers, and Gamblers from my experiences in Valkrum Dunes, they drop from them too, but its extremely rare.