This node’s alt text says “This grants more damage over time against enemies afflicted with Spreading Flames instead of Possessed if Hungering Souls is converted to Fire.”
Considering that Acolyte doesn’t have access to Spreading Flames anywhere in its skills or passives, this seems unintentional. Is it actually Ignite (which the conversion does apply) but the text is incorrect? Or is the node useless for Fire conversion as it seems?