Double post out of a lack of trust of this site.
What does this mean?
We don't know yet, but whatever it is was enough to make Abby go chasing after Cawl like a cat after a string.
Also a " A metal giant in a scaled cloak." -> On reddit the guys say this is Trazyn adding Creed to his "pokeball" but I remember one of the primarchs wearing a scaled cloak? Vulcan?
However, it's mentioned on the GW page for his model that he has "a giant man clad in baroque power armour" locked away in one of his collection. That could
be a Primarch, but we don't know for sure.