“Next I wyll speak on the Ymps, or Blue Devyls. Ymps are flymsy of Body but possesseth a Tongue most vyle and skylfull in the Art. The Blue Devyl possesseth Skin of nyght-hue, hyr Mask is royal, and hyr Blood is ebon. Ymps have a certyn Fondness for Lyquor and Vyce that suiteth a crafty Sum’ner well should he wysh to gayn Employment of these Fiends.”

– Thulsa Drulle’s Daemoniac Maleficum