Tiny worms around J-7, they drop Blanched Silver, which is used to pop the NM. NM is just a Tier2 NM that drops Key Item(Mucid worm segmant) needed for a Tier3 NM. Most seals we had from one was 3, and a few dropped nothing at all. Also had 2 Unkai at once and then 2 Creed at once.
PS. Eft NM also dropped a Unkai seal, and i'm willing to bet more NMs in zone do also.