Arrogant and Rude
May my foe be arrogant and rude.
Let him (or her, for there's no sex distinction) believe that his incredibly deep insight should be immediately acknowledged by all within shouting distance.
Let his demeanor signal that all peers are peers in name only.
May he ridicule the most gentle members of our group so even those who favor his position will be embarrassed.
Encourage him to overlook flaws in his reasoning and help him to remain rigid when such flaws are exposed.
Guide him into anger when it is least seemly and most likely to cloud judgment. Let him shun any acts of generosity or compassion.
Convince him that he is the one and the only and that the rest of us are fools.
I cannot ask for more.