Gargoyles S02E11 - City of Stone (3)

Aged considerably in the past, Demona meets MacBeth and the two make a pact, conjured by a trio of witches to bind their lives together, giving MacBeth's youth to Demona, while also preventing the two from aging any farther. The only way to break the spell is for one of them to kill the other; which would be hard as they feel each other's pain when close to one another. Meanwhile, in the present, Goliath is approached by the Weird Sisters offering their help, as a new Hunter tries to kill Demona.