How do Clan Stronghold sieges work?
The Chief or an Elder goes to the Tower of Odin in the Stronghold and starts a siege using Precious Dust. Sieges last two hours. During this time, enemy Jarls or troops of jötunns attack the Stronghold. The Clan's members send their warriors to the Fortress to defend it. Killing enemy warriors grants players Soul Shards and points in Competitions that have killing enemy warriors as one of their tasks.
After the two hours are up, the Stronghold's status changes to Guarded, meaning that it can no longer be attacked. At Tower of Odin levels 1–4, you can start another siege after three days have passed. At Tower of Odin level 5, this is reduced to two days; at level 6, it is just one day.