خلاص لقيت الحل بالتفصيل 
ياحبينيلك يا جوجل :P
After events in Barheim Passage, you can return to this from other entrance in
Dalmasca Eastersand. The reason to do this is to get an optional esper and some hunt marks.
1) Complete the hunt mark Cactuar flower and hunt mark Niddhog
2) After you get your reward from Dantro (the cactuar flower hunt mark petitioner) talk with him again
3) Go to the south of Nebra river and talk with Dantro’s wife
4) Leave the screen and re-enter, talk with the boy named Chiguri
5) He’ll take you to the north of the river, there some events will take place
6) Once you are back to the south side, talk with Dantro’s wife, then search behind her house for a red flower, examine it, now a catuar will follow you, take it to Chiguri
7) After some scenes, talk with Dantro’s wife again, she’ll ask some items, the first one is in the left side near the river (it’s a shining object), talk again with her, for the second item go back to Dantro’s campment talk with him and examine the boxes and some jars in the center of the screen. Now return to Dantro’s wife, it’s time to get the final item, you to Brokensands screen in esaternsands. The item is in the middle of the screen next to a withered rock.
8) Give Dantro’s wife the final item and the Python's Scaled Skin that you got from Niddhog, leave and re-enter the screen, talk with Dantro’s wife and then go to the back of her house and talk with the traveller to receive the Barheim key!