[.o0O0O0o.]

the only one i can think of are the ice vivi's but those are for lvl 25+. Oh the lizardman drop them. And any of the summoned monster drop 'em. To check if it's a summoned monster or whichever. Look at their sp bar, to the left of it, there's a colored circle; if you hover your mouse over it, it'll tell you what type of monster you're looking at. And SBL only drops from summoned monsters.