Royal Griffin
 

Can anyone tell me where to find royal griffins?

They should be available in Greenwort and Arlania before the plot twist. And than there are guaranteed ones on Iceland, very late in the game though.

i'm on that island, not yet go to demon portal, and cant find them

I found them on two places in my first game. The Captain of the guards (next to the castle) had 80ish and the dwelling on Griffon island (in Arlania the island off the main continent) had a massive 580!

What dwelling?

I found a bunch for sale in Merlassa (sp?) the Elf land. In was one of the houses in the big cluster of buildings and castles.

Oh, sorry. Hadn't realized I hadn't contributed.

Royal Griffs have a tendency of being available at:
a. The Guard Captain Renli, in Greenwort, after doing Iron Richard's (in Arlania) Quest. No fighting required.
b. Getting 1 of the 3 artifacts to the Prince Consort a.k.a. the only guy who could've married Amelie who probably wouldn't get her pregnant.

first didnt work in my case, and where i can find one of those artifacts?

They're the main quests that pop up after you talk to him when you first arrive in Greenwort. Yeah, that pretty much means you won't be able to use royal griffs for a while, unless you can find them elsewhere.

when i give him heart, only new units i get is red dragons, and cause i play with humans i cant use them