Chaos DoT Specter that isn't caustic ground or poison.

Anybody who uses Dark Effigy might understand what I'm getting at here...

I've been pouring through the specterable creatures and I haven't found a single one that causes a Chaos Damage DoT Debuff that isn't poison. For whatever reason, caustic ground effects do not count as a Debuff while standing on them. I was hoping to find a specter that could trigger Dark Effigy interaction without using poison as poison's duration is too short for consistent uptime on just a couple specters. There's also 2 other ways to get poison reliably anyways through the support gem or through the swarm minion spirit gem. You can also use skeletal snipers. I just thought a specter would be a neat method but I'm disappointed that there isn't and that caustic ground effects don't count. Even the Cultist Archers aren't a Debuff that DE will interact with.