伊尔莎’s brand of doom, crust, and death metal-influenced sludge metal is as undiminished as ever on this latest release. 伊尔莎 have a raw heaviness that’如此沉重，感觉您的扬声器将开始沉入地板。尸体要塞是非常非常沉重的记录。但是，’并非没有细微差别或旋律，乐队本能地知道何时用原始力量压扁和拆除，以及何时’最好选择更令人激动的方式。当然，两个竞技场’也不能互斥。
Have I mentioned this is a very heavy band? No? Well they are. This heaviness is forged and tempered into the types of riffs that a lot of bands would kill for. 伊尔莎 have always had an ear for a good riff, and Corpse Fortress is swarming with them. Whether slow, mid-paced, or fast, the band write their music with an obvious heartfelt passion and a natural instinct for what makes a good sludge tune.