Source: Enter... MONOCULUS!... AGAIN!Monoculus is tough for a floating eyeball with no big arms to slap you around with. But apparently he's no match for the TF2 community's passion and ability to kill floating eyeballs.
To up the ante, and to challenge those of you who can best Monoculus with one eye tied behind your back, now every time he is defeated, he becomes tougher when he respawns. Go get him!
Hm, maybe it's worth actually playing Eyeaduct again to see how mean he gets.