A species of dog that reigned in the late 1000's which had conquered most of Eastern and Central Europe. The Gustas tend to be bilingual, speaking a range of Spanish, to Czech to English to
German. The Gustas observed a dictatorship which followed (in their prophecy) a master. Scientifically speaking, a master observes a
gene called AOD1, which the Gustas can smell. Once aware of the gene in a
human (which occurs 1 in 1,000,000,000,000 people) they name him there master.