The Skull Collective are a team of BEings that work thru the crystalline structures that humanity reference as "crystal skulls". Their role is to support the human physical vehicle thru the transition period that begins at the end of phase one and the beginning of phase two of the ascension to full evolution process.
Without support thru the matrices it would not be possible to remain consciously incarnated into a human physical vehicle. The BRIDGE that WE must prepare to cross is that which is labelled "death" in the Old Earth Matrix. Within the bible it is reference thus :
Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
2 Corinthians 5:17