Their first two albums were not very successful , but with Vain Glory Opera in 1998 they achieved a breakthrough , thanks in part to production -LRB- and additional lead guitar work -RRB- by Timo Tolkki of Stratovarius , as well as guest vocals by Hansi Kursch of Blind Guardian .
Their style of metal is power metal .
Their style of metal is power metal .
문장을 간단하게 만드십시오: Their first two albums were not very successful , but with Vain Glory Opera in 1998 they achieved a breakthrough , thanks in part to production -LRB- and additional lead guitar work -RRB- by Timo Tolkki of Stratovarius , as well as guest vocals by Hansi Kursch of Blind Guardian . 산출: