Hi all,
Cookies for anyone who can find this.
Merlin's magic is revealed when he saves Uther and Arthure from 12 powerful sorcerers seeking revenge. After Merlin defeats them, Uthur sentences Merlin to death, Arthur won't let that happen and raises arms against Uther. Uther has to banish Arthur, Merlin and a couple knights that supported Arthur.
The sequel has Arthur and company staying in Ealdor and then traveling to compete in a tournament of another kingdom. Arthur and his knights compete as nameless knights and Merlin has to "compete" with the hosting king's sorceror. The hosting king is kind of ruthless and offers Merlin a job. There is a little bit of Arthur jealousy/insecurity. Also, in this story Arthur and Merlin get together.
The first story was written maybe a year ago, but the I think the sequel was fairly recent.
Thanks in advance.
Found super fast, The Beltane Cycle by astolat
http://archiveofourown.org/series/172