The clan level can be raised. Raising clan level requires the following:
Level 1 - SP : 20,000 Adena : 650,000
Level 2 - SP: 100,000 / Adena: 2,500,000
Level 3 - SP: 350,000 / Item: Blood Mark
Level 4 - SP: 1,000,000 / Item: Alliance Manifesto
Level 5 - SP: 2,500,000 / Item: Seal of Aspiration
Level 6 - Clan Fame: 5,000 / Clan Member: More than 30
Level 7 - Clan Fame: 10,000 / Clan Member: More than 50
Level 8 - Clan Fame: 20,000 / Clan Member: More than 80
You can obtain a Blood Mark by killing a Bloody Queen. They are located in Watcher's Tomb or around the Forbidden Gateway.
To obtain an Alliance Manifesto, meet sir Christopher Rodemai of Giran Castle Town.
To obtain a Seal of Aspiration, see Sir Gustav Athebaldt in the Town of Oren.
How to obtain Clan Fame