So as I see in the Codex/Magic Burner, someone with the Summoning skill starts out with a Journeyman(0D) affiliation with the restless dead. This normally costs 10rps.
My question is; if they want to upgrade it, does the character pay the difference in rps for restless dead ( i.e, 10 pts for First Circle(1D) from 10pts to 20pts ), or do they have to pay the entire cost to reach the next level (20pts).
Thanks!