The Covenant
The Covenant guild dates from the Archmage era.It was a big recruiting guild, with branches on different servers (Server, Blitz, Ager). The Covenant was a so-called 'Honour guild', meaning they would war you if you multi-attacked them for no reason, or countered to often etc. They were known for there at-that-time very fancy website (by Morticus).
When The Reincarnation arose, The Covenant revived itself and is present on Blitz.