I would like to share these information to others. First and foremost, you need to save the coins that are dropped by the mobs/monsters on R5 and exchange these for keys to open the sacks and chests.
The keys are:
Shuriel's/Celia's/Syrephis's Offering Tray
Shuriel's/Celia's/Syrephis's Collection Box
Shuriel's/Celia's/Syrephis's Treasure Box
These talismans can be found on:
Shuriel's Offering Sack
Shuriel's Collection Sack
Shuriel's Safe
Celia's Offering Sack
Celia's Collection Sack
Celia's Safe
Syrephis's Offering Sack
Syrephis's Offering Sack
Syrephis's Safe
Location:
Rahkon Dungeon Level 5
Blue Map (lower right)
Warm Wind Talisman
All Status +3
30 days until expiration
Cold Wind Talisman
All Status +4
30 days until expiration
Sharp Wind Talisman
All Status +5
30 days until expiration
Strong Wind Talisman
All Status +6
30 days until expiration
Feel free to comment.