Kamelot此前是一个纯粹的美国乐队，之前名为Camelot，为了便于搜索改为Kamelot。前主唱名mark姓Vanderbilt（不知道是不是范德比尔特家族的），与前鼓手一起因无组织无纪律被踢出，所以第三张专辑 Siege Perilous写完后仍然没有主唱，直到乐队创始人之一吉他手Thomas Youngblood找到挪威前卫金属乐队conception主唱Roy Khan的电话号码邀请他帮忙。
起初他并不想全职加入kamelot，只是想尝试和帮忙，去美国之前他听了乐队的前两张专辑，并非是他喜欢的风格但也认为有一些很cool的元素。第三张专辑的最终效果，包括后期混音等，他并不太满意（他比较喜欢全程把握创作和制作过程，他后来也并不是太喜欢在别人的专辑里参与客串），但在此期间对Thomas等人的好感以及他们共同创作一首bonus track（应该是One Day）时的化学反应还是促成了Roy的正式加入。（kamleot为了拉他入伙，还特意公关了一下，几个人一起玩了把跳伞。）
第四张专辑名为The Fourth Legacy，“It was the first album to credit vocalist Roy Khan as a writer on all tracks, establishing him as the main songwriter of the band together with founder and guitarist Thomas Youngblood”（wiki），并且他们找来了大牌制作人Sascha Paeth和Miro，开始了此后的合作（Miro长期兼任键盘工作）。专辑封面设计也由Thomas的妹妹换成了插画艺术家Derek Gores，包括后面几张专辑的封面都是他的作品（Thomas还是更倾向于他妹妹的作品，但对于一些改变他都可以接受）。同时因为新鼓手Casey Grillo的加入，乐队的鼓点快了很多。此后的专辑，男声或女声的和声都运用的非常有特色。
可以说这张专辑打造出了大家喜欢的kamelot，甚至很多人会说是“Roy Khan的kamelot”，受到乐迷高度评价的不仅是动听的旋律和歌喉，还有Roy的作词才华，例如《the legacy of Roy Khan》这篇文章就赞扬了二人迸发火花的合作和Roy歌词方面的创作。二人的创作风格都比较受到Halloween和Queensrÿche等乐队的影响。歌词方面，专辑同名曲目基本就是Roy加入Kamelot的心情写照，对比前后期作品可以看到他的心路历程，包括对信仰的思考与转变。
对比Khan时代的几张专辑，老罗这个时期真是年少气盛，明显比epica时期生猛激情，歌词充满豪情壮志，声音堪称华丽，仿佛能让人看见光，尤其是在The Fourth Legacy和Nights Of Arabia里。这是他在kamelot唱的最高的一张专辑（Eb5），其实他的音域并非高音，可能属于次高音或者中音，据说他的一位老师就曾告诫过他唱金属会损伤他的嗓子，而他还是选择了心爱的金属，并为其燃烧自己。
A Sailorman's Hymn在《The Expedition》（2000）里的现场版唱得特别高，退出后在教堂唱的那个视频，高音似乎略显吃力，但更为婉转悠扬，情感更加细腻深沉，特别打动人心，尤其是垂目而立的时候，不知道他是否心事苍茫。
"Dear fans and friends,
There have been a lot of speculations around why I am not touring with KAMELOT and I want to make a statement although it may not prevent further guessing as to what's actually going on. It is a fact, however, that I told the guys in the band already last fall (well after my burnout) that I was leaving the band. Naturally enough, they were shocked (as was the label and everyone else working with KAMELOT). In addition to risk of dropping ticket sales, they wanted to give me time to think things over, and so I did. My decision still stands; it is finished.
I am currently spending time with my family in Norway taking it easy and wondering profoundly what the future is going to bring. Communication with the outer world has been so and so, but I have had several talks with Thomas along the way, although I am still called in sick.
I am terribly sorry that my decision is affecting so many others and I want you to know I wish the band and associates all the best for the future and that I enjoyed every second in the spotlight. How could I not?! They were nourished by the best fans in the world!
I am eternally thankful for everything you and KAMELOT have given me and equally sorry that it has to end here. The good news is; God was there after all...
Love you to death!!!
All the best &amp;amp; so long,
In a recent interview with PowerMetal.cl, KAMELOT guitarist Thomas Youngblood stated about the band's decision to recruit
Lione to fill in for longtime KAMELOT frontman Roy Khan, "I've heard some songs with Fabio singing — some KAMELOT songs like 'Ghost Opera' — and he sings quite different than he does with RHAPSODY for KAMELOT, which also, of course, makes sense, because it's a different approach to vocals.
"The idea ［to hire Fabio for the tour］ came from Sascha Paeth, our producer, who also produces RHAPSODY. He suggested it because he has worked with Fabio and knows his abilities. But, obviously, the high range that he can do with songs like 'Center Of The Universe' or 'Nights Of Arabia', these are songs that we… I think over the years, Roy, his range has dropped, so a song like 'Nights Of Arabia' is no problem for Fabio to sing. So we're gonna add some songs ［to the upcoming tour's setlist］ that we haven't been able to play over the past few years that I think fans have been wanting to hear."
When asked about the rumor that Roy Khan's "religious conversion" played a major part in his decision to sit out KAMELOT's current world tour, Youngblood said, "This is what we do, this is what we love doing — the band loves performing, we love touring. And I don't know if Roy has lost that… in his heart, in terms of what he likes doing. I know that there are some other issues. I know that there is a religious aspect to it now that I can't really 100 percent explain. Obviously, we were disappointed, and I'm not gonna lie, I was a little bit pissed off about it, but at the same time, we — the whole band, together — decided, 'Listen, we're not gonna slow down! We've got this new album and we wanna come to South America.' And that's what we're doing."
"Whenever we had a day or two off in Europe ［on previous KAMELOT tours］, ［Roy］ needed to fly home, which I thought was kind of extreme, to fly home, but that kind of was a sign was that I should have noticed that maybe the touring part was not for him. But the religious aspect of it is something that I want him to kind of talk about, but I know that he had been going to religious classes, for whatever reason. Obviously, over the years of working together and being, at times, best friends and things like that, we have discussed all kinds of topics about religion, so it's actually very surprising to me that this is where we are at now with him. But I don't really wanna talk too much more about it, because that's really something, I think, that he should come out about, in terms of what he believes or doesn't believe or whatever. All I can say is right now the band is unified and we're just not gonna slow down."
Regarding the possibility that KAMELOT may need to look for a new permanent singer, Youngblood said, "I don't really wanna think about that until this touring cycle is over. All I can say is we're not gonna fire him; that's not my position and I... It is my position, but I'm not gonna do that. . . If Roy decides that he doesn't wanna do this anymore, he has to make an announcement. But right now, I think the smartest thing for us, and the most compassionate thing, is to just give him the time until the next record, until we start really working hard on the next album, and if by that time he is not ready to work and doesn't wanna work, then we have to look at the possibility of getting another singer, which is, obviously, something we are willing to do, if we have to do that."
Read more at http://www.blabbermouth.net/news/singer-roy-khan-officially-announces-his-departure-from-kamelot.html#9CjwFCYmMSDZoCjV.99
The forth legacy.One of Roy Khan’s first songwriting contributions to Kamelot, this song is an allegory for his experience in joining the band, wrapped in the high fantasy trappings that had been a staple of Kamelot’s lyrics up to this point. Khan would later go on to write other songs about being the singer for Kamelot, most notably The Light I Shine On You and The Great Pandemonium, but this one is unique in that it shows his early unbridled enthusiasm for his role with them.This song also has a faster tempo than any that Kamelot had done up to this point, which Thomas Youngblood explained in an interview, saying “We did intentionally write faster songs on this ［album］, basically because we had a drummer that can do it.”
The Shadow Of Uther.This song recounts one of the central themes of Arthurian legend–how King Arthur’s eventual downfall was the result of the actions of his father, Uther, before he was born.
Lunar Sanctum is completely written by Roy.所以这首的风格很接近conception，也是整张专辑里他唱得最高的一首，虽然这首名气不大，却是被很多乐迷奉为经典的一曲。