There's more than one band under this name.

Death Knell - Calgary, Alberta
https://thedeathknell.bandcamp.com/releases

Death Knell - Portland, Oregon
https://deathknellofficial.bandcamp.com/releases

Deathknell (mispelled name brought here) - India
An early years style power metal band with a rough edge. Think NWOBHM, just 30 years too late!

Formed from the ashes of East Midlands Power-Thrash band In The Ravens Name and Melodic Death band Scramasax, Death Knell count Venom, Helloween, Gravedigger, Iced Earth, Sabaton and Judas Priest as their principle influences. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.