Greater Powers
Gods are amalgamations of immense concentrations of both will and arcane magic. Sevesahr's system does not have any gods looking upon it, though they exist elsewhere.
Or maybe gods have ascended a layer or something. Doesn't matter yet, either way.
What are warlock/witch patrons then on Sevess? Maybe entities from other rings looking to travel the arcane bridges to reach Sevess. Maybe not. Maybe a full redefinition is in order.