: Their immortal, not invincible. The ritual probably not
: only makes them immortal, though, it prbly also heals
: them at the same time, so when they're already
: immortal, they can still use the ritual to heal
: themselves. The ritual appears to be one that gives
: life to the object of the ritual, and the
: "worthier" they are, the more life is given
: to them, up to the point where it gives them eternal
: life (provided they don't get fatally sick or chopped
: in half afterwards).
: Doom
That would explain why (besides any ingame mechcanics reasons) they heal to full health, unlike any other unit.
And how would someone who is immortal be vulnerable to being sick? Not to say its impossible, but I wouldn't expect it to happen.
Seraph