How do I keep from dying when I try to stop the ceremony?

Hint 1 of 7:

You can't just jump out; you need to destroy the groom.

Hint 2 of 7:

To do that, you need to have gimmicked the chandelier above him.

Hint 3 of 7:

Did you examine the makeup in the witch's room?

Hint 4 of 7:

Applying it to the chandelier chain in the small passageway will eat the
chain, but it takes time to work.