It was Benighted from Still Life, basically the first 10 or so notes of the first "riff" (whatever you call an acoustic part) is exactly the same. TBH it would almost be more comical to take this to the Opeth forum since most people there would "gang up" on you but would probably make themselves look pretty mentally deficient at the same time (admittedly Opeth has a few bad fanboys just like Tool, Metallica, Dream Theater, etc.). But at the same time I agree that people find it trendy to bash these kinda bands that are obviously fairly musically accomplished (I personally think most Dream Theater is boring but at least I haven't made a post about them yet), and that's kinda sad, as we could be using our energy to bash the more mutually hated nonsense like Slipknot and Dragonforce. Hell even Bloodbath deserves bashing more than Opeth, I mean at least Opeth is legitimately unique as hell whereas Bloodbath fans totally blow off a lot of similar music that's quite often better.