Alternates between Magic Immunity/Black (Scales of Magic) and Poison+Disease Immunity/Green (Scales of Disease).
Appears to cast 2 separate spells depending on which color he is.
During Black/Magic Immune, casts Terror and Terror Blast.
During Green/Poison+Disease Immune, casts Putrid Breath and Vile Plague. I am not positive on those spells, there are 2 versions of each on Lucy.