Best place for O- blood?

[Karlsburg]

Been wandering the temple for literally an hour now, leveling up my girls to try to defeat that giant nightmare and haven't gotten a single O- blood crystal. Trying to get enough to devolve Thumbelina so I can rearrange some CP and get a small bonus, but that's kind of hard when O- blood is so difficult to get! Has anyone found a good place for them? I know those shell mantis' drop O blood but all I've been getting is O+ or O. Damn man, the grind is real...not always a good thing

[EckyThump]

Downtown is a good place for O- blood, as two of the commonest enemies only drop O blood of different types. I presume you went with Temple first. In that case I can only really suggest the rabbit-like enemies in City Streets.

[Karlsburg]

Yeahhh I chose Temple first :/
Darn! Thanks for the suggestion!

Originally posted by EckyThump:

Downtown is a good place for O- blood, as two of the commonest enemies only drop O blood of different types. I presume you went with Temple first. In that case I can only really suggest the rabbit-like enemies in City Streets.

[Karlsburg]

Note: The Shell Mantis, in the temple, is the monster that drops O blood, and has a chance to drop O-
That's been my grind, until defeating the first giant nightmare, and now cinderella has joined the team and we can explore Downtown.
I'll devolve Thumbelina eventually lol.