Contracts with the supernatural are very tricky things... often, for large and lasting amounts of power, or blessings, the contractor's descendants are promised in the bargain.
[His voice is very soft.]
It isn't fair... but that's how it is. Much in the way a parent decides the future for a child against their will, an ancestor can promise that which is not his. That ritual... it had to come from somewhere. The Abyss had to be opened. Someone made that choice for themselves and for the future... as grim as it turned out to be.