[quote=@thewizardguy]
[@Absolis]
Apocalypse's skin can't be hardened, logically. It's described in the comics as being denser and heavier than lead, and yet softer as well. It defies the standard laws of physics, but so does everything.
[/quote]

That's an interesting little tidbit to know. Though theres still the fact that Cyano knows about the fact that his eye is soft and leads directly to his brain. Thanks to the ethereal recording the battle between the two.