There are multiple artist under the moniker "The Entity". I) The Entity were a Melodic Metal / Gothic Metal band from Norway.
They were active from 2000-2003, only released a demo, a single and an EP. II) The Entity is a melodic black metal act from Croatia. Biography (taken from MySpace - http://www.myspace.com/entitythe): The Entity (or Tri-Entity) came to existance in November 2001. It was one week after my former band Red Zelenog Zmaja (Ordo Draconis Viridis) had been disbanded.