In demonology, Malphas is a mighty Great Prince of Hell, having forty legions of demons under his command and is second in command under Satan. He builds houses, high towers and strongholds, throws down the buildings of the enemies, can destroy the enemies' desires or thoughts (and/or make them known to the conjurer) and all what they have done, gives good familiars, and can bring quickly artificers together from all places of the world.
Malphas accepts willingly and kindly any sacrifice offered to him, but then he will allegedly deceive the conjurer.
References
Malphas Wikipedia(Text) CC BY-SA