It's entity 0, but it's not canon.
Kane's videos are part of his own canon.
Is refered as "bacteria" in Kane's patreon (or koffee idk i read that In a comment).
BACTERIA
I bet it's a duller
It's bacteria
Dude’s be spreadin’ BACTERIA
Maybe a duller or sixarms, though it could be a howler, since we've never seen what one looks like, or entity 0, or maybe even a new entity
Bacteria
A black bacteria that is 1000x worse
What do you think?