Sacred Easter Egg - Bfg Easter Egg

This easter egg is a reference to the 'Doom' series of games. A weapon featured in the games Doom, Doom II and Doom 3 is the BFG9000. One of the skills that can be learned by the Seraphim is called the Bee Eff Gee, and its description says that a large weapon that fires green blobs of energy appears when the skill is used (much like the Doom weapon).