Guest
The one with Spike's mum could be Masks & Mirrors by Pfeifferpack. The summary is:-
There's a glitch using those Ghorah eggs as a surprising result develops from Dawns attempt to bring back her mother. Those developments both thrill and horrify Spike as the scoobies and Buffy discover the man behind the mask. Can a mothers love heal and bind or should the past be left in the grave? Setting: Season 5 mid episode "Forever" going AU from there. Liberal changes made to the ritual Dawn uses for the resurrection spell.
You can find it on this site or at Nocturnal Light, Elysian Fields, Bloodshedverse or Just Rewards.
Enjoy!

Sarah