We still don't have specifics on the arrangement, but it had to do with beating BYU football in exchange for something. The pact might've finally expired recently but we don't know all the details. We know he grew a tail from it.
Other than that, they've beaten us 9/10 times in recent matchups. Even when we've been slightly favored or heavily favored, they've still found ways to win. Odd ways to win. They've been very frustrating losses.
Call it recency bias.
I don't recommend it, but here is a post with the last decade of Holy War lowlights. Life has been difficult.
https://www.cougarboard.com/board/message.html?id=34101531