There is an incentive variant of this cover with the image in reverse negative; There is a Graham Crakers exclusive variant of this cover with the image in black and white with only Sonja's hair being colored red
This issue is a variant of Red Sonja (Dynamite Entertainment, 2005 series) #25 [Art Adams Cover].
There exist further variants:
Red Sonja; GUESTS: Osin; Valera; Caska; Suumaro; The Goddess; VILLAIN: Kulan Gath
Synopsis
As Sonja and her pirate allies sail home, they discover that Kulan Gath has captured the Goddess and taken over the world. Sonja meets with a ragtag band of rebels hiding out but, before she can rally them to fight against Gath, she has to face her darkest fears in a mystic tree. She gets a little help from the ghost of Suumaro.