PiedMon was probaly the strongest Master of Darkness.
He made digidestined a lot of trouble, and almost brought them
the the end. However he didn't succeed and was defeated by HolyAngeMon
( MagnaAngeMon ). His main minor was LadyDeviMon, and she have fought
first, before him. And right before being killed he've called many
EvilMon's which ware also his minors.
PiedMon is an wizard and this he had prooved by his atacks.
For exemple the one which he've used to change digidestined and their
digimons into dolls. PiedMon also looks like an wizard. His face is more like an mask,
and his hair is bright orange, so it looks like buirning, but somehow
he wares the clotheth which would pass more to a full. Well anyways, this doesn't
change the thing that he was very strong and smart. Of course evil as well.