[Gatts]

There is sadly no static place for sacrifice... but there is static place for green dragons... in Thousand Rivers, Ellinia (you have to get a ship and try to find them)... it should be somewhere on the coast near the locked labyrinth...
Dryads should be always placed somewhere in Ellinia, and with sacrifice you can bring them to numbers (it happend that I got only 95 dryads from a shop... and nowhere else than in this shop....)