The aura affects any mortal susceptible to god magic. In the maze, Zamorak was, temporarily, a mortal once more.
Remember that Zamorak's Coup only started coming together after Zaros withdrew from the empire and the effects of his aura started wearing off.
The more interesting implication is why he didn't want Sliske to be aware of the aura.
Or maybe that's supposed to hint that Zaros wasn't ever affected by the 'de-god-ing' magic Sliske had in the maze. Such an immunity would explain why he and Seren (if he can do it, so can she) were able to remain in the maze when the other 'losers' were expelled.
Though we'd then be left wondering why Seren's love aura didn't affect him. Or maybe it did, and that's the only reason he let the opportunity to attack her go despite how much he hates her.
31-Jan-2018 19:28:18