Clarify Shadow Creatures' description, bring back "Abyssal matter".

The previous wording implied that the monster's items were permanent
(well, at least that's what I thought when I first saw it). It also
sounded a bit like it summoned monsters that were copies of ones you
could see; hopefully this is a bit clearer.

"Abyssal matter" was changed because it apparently implied that it
should be unholy (back when the spell was unholy), but I personally
like the flavour and don't think anybody would think that if one didn't
know that the spell used to be unholy.
Don't waste time casting Sublimation of Blood when at max MP.

I guess you could have used it with PbP...?