- Clairvoyance is now a charge-based prevention. Additional practices
    beyond 100% will help to increase the amount of spying that can be
    done with clairvoyance (see the updated helpfile). Failures due to
    anti-spy will consume a charge (see below).

  - This is the first change being made to "spy" abilities; the other
    spy spells will soon follow suit. IMPORTANT: Once the spy spells are
    adjusted, I will be going back over the !spy races (Koj'ehr, Thoe,
    Svirfneblin, Dark Elf, Veldruk, Daimonikos) and reducing their !spy
    percentages. The reasoning is thus: the !spy races were our attempt
    at balancing out the power of spying, but I am uncomfortable with
    some of the effects resulting from 99%-100% !spy. With a fair charge-
    based system of spies in place, I can reduce !spy percentages to more
    reasonable levels and still have those abilities matter, as attempting
    to continually spy a !spy race will cost more charges in the long term
    than a race vulnerable to spies. (As beneficial side effects, astral
    travel will no longer be strikingly inferior to clairvoyance and shadow
    gaze, and no race will be completely unspyable.)
   
    In the end I'd like to see !spy races "cost more" to spy, in terms of
    charges, but not be completely unlocatable.

    -- Help File --

Clairvoyance:

Usage: clairvoyance <target>

Clairvoyance is a charge based prevention ability. Charge based prevention
abilities allow the user to use the prevention ability until the given number of
charges is exhausted. Once these charges are exhausted, the user must wait for
the prevention effect to fall before using the ability again.

The power of clairvoyance is vast, and yet its visions can be both blessing and
curse to those who have not mastered it. If one is clever enough, it is possible
to find some meaning in the erratic and often painful images. Yet, be warned -
some visions may prove to be so chaotic that they will physically throw the
clairvoyant to the ground! A master clairvoyant of sufficient mental fortitude
will learn to adapt, however, and will eventually receive visions of startling
clarity.

The prevention of clairvoyance may be lessened somewhat if the clairvoyant
possesses a powerful constitution. Those clairvoyants who have exceeded 100%
ability mastery have been known to enjoy greater access to this power as well.