While fighting Nuurag-Vaarn I got the "Your eyes have merged to form one larger eye" corruption (Cyclops). I checked my corruption list to see what it did, and it appeared twice, representing my 2nd and 3rd corruptions. I'd have expected to only have 2 corruptions at that point, so I don't think I got 2 and they got the same name (that's a lot of corruption from one attack round)

He continued to corrupt me during the fight (you'd think he'd be worse at hitting me while BLIND), but as I gained additional corruptions, the "bonus" cyclops corruption kept getting pushed farther down the list.

As of now, I have 5 corruptions listed:
Teleportitis
Cyclops
Sweat Blood
Gills
Cyclops

I have no idea if it's unique to Cyclops, or unique to fighting Nuurag-Varn. This was before day 90.