Confused about skill gem interactions with Corrupting Fever.

I honestly think this is the first time in all these years that I've ever been confused as to how a build functions, so here we go.

I've been trying out the whole "Corrupted Cry/Reap" thing so far this season (over the last few seasons I've always done some kind of reap/exsanguinate build), but here's my question: Every single build utilizes this gem setup; Corrupting Fever - Brutality - Swift Affliction - General's Cry.

My question is this - If General's Cry states that it summons Mirage Warriors to trigger an attack skill linked to that gem, and Corrupted Fever is a spell, what exactly is occurring, because it sure as hell seems like nothing is happening unless I also use the Corrupting Cry support gem, which not one build seems to show in any kind of PoB.

So am I just being dumb and ignoring the obvious "use the support gem, idiot."?

Thanks for taking the time to respond!

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Othervoices wrote:

Every single build utilizes this gem setup; Corrupting Fever - Brutality - Swift Affliction - General's Cry.

Couldn't find any on ninja.

General's Cry linked to Corrupting Fever makes no sense. I guess Corrupting Fever was a placeholder for Corrupting Cry support before the gem was added to PoB.