06 Sep 2005 at 08:43 - 3
As Lasareth said, Sigil drops in HoH are purely random - sometimes they will drop and sometimes they won't. Just keep on trying and keep on winning, eventually you'll get one drop for you.
Or you could save up and buy one from the trader (assuming it has any to sell) or from a player... But if your friend is with a team good enough to win in HoH multiple times, I'd say his best bet is to ust keep winning in HoH for the sigil.