We don't need no stinkin promo codes.
In all seriousness, No promo codes for ice hockey that I know of.
Just season tickets for $225 or $15 per game
(great deal btw even if you don't go to all)
Or go the flex pack route.
I haven't looked into this myself, but I think they are pricing the ND, BC, BU, high demand hockey east tickets at a higher price than 15/game if you go individual route. Plus box office price is always higher...
Consider buying a ST and split with friends or consider it a donation/give tickets to students/friends/kids.
The more people in the arena the better...