Rune of Scale not dropping from A firescale crocodile
 

A firescale crocodile is supposed to drop one of the Runes of Scale for the Runescale Cloak thread.

http://wiki.project1999.com/A_firescale_crocodile

This mob is not dropping the item after 50ish kills, even though the droprate is common.

Not in the game yet. Temple of Solusek Ro gets added later along with all the quests and quest items.