GRB contagion

The GRB contagion, short for Gulus Realm Burst contagion, is a virus that causes Digimon infected by the GRB factor to undergo a twisted change in personality and run amok. However, Black Digitron, the secretion said to cause the blackening, has not been confirmed to cause infections in Digimon who have it in their systems. During research into Digimon that can secrete the so called GRB contagion, simulations of injecting enormous amounts of the contagion into such Digimon resulted in Arcturusmon, a "theoretically" possible Digivolution. Supposedly, Arcturusmon can inject Digimon with the GRB contagion by using its "Black Death" attack on them.