Control Day-Night - proposed SJ spell

This is a proposed spell for use in a spelljamming setting - it
would be pretty trivial to do a non-3rdEd version if this was
desired.  The idea is an environment modification spell, rather
than one which out-and-out produces an artificial environment.

In particular, the spell would be useful on Selene, in Maj Space,
to fix the problem of the 14-day long days, followed by the
14-day long nights.


Control Day-Night
Transmutation
Level: Clr 6, Drd 6, Sor/Wiz 6, Util 5
Components: V, S
Casting Time: 10 minutes; see text
Range: 2 miles
Area: 2-mile-radius circle, centred on you
Duration: 24 hours
Saving Throw: None
Spell Resistance: No

You change the day-night cycle in the local area.  It takes 10
minutes to cast the spell and an additional 10 minutes for the
(full) effects to manifest.  You can produce a day or night
appropriate to the climate of the area you are in.

You can for example produce an eclipse, if this area ever has
such a thing.  Alternatively, you can alter the appearance of the
sky as to the number of suns, moons, stars, or patterns or
movements of stars.  This will not produce any hotter days than
suit this area, or colder nights.  You can cause dusk then night
in the middle of the day, or dawn then day during the middle of
the night.

If desired you can terminate the spell early, for example, you
start casting the spell, after ten minutes an eclipse starts, the
eclipse reaches maximum after ten minutes, then over the next ten
minute clears again, and you terminate the spell.  If you wish to
use this spell inside an enclosed space then it must be immense;
no normal artificial structure will be suitable.

A particular use of this spell is in a spelljamming setting,
where you want a 24-hour day-night cycle, optionally with
seasonal variations such an Earth-like world would have.  This is
generally done by enchanting a magic item with this spell which
produces this spell effect once per 24-hr day.  A moon which is
tide-locked to a planet can then have a 'standard' day-night
pattern, as long as this does not increase the average amount of
sunlight received over a year.  Sometimes this spell is used with
something like an artificial sun to turn its continuous light
into a more useful day-night pattern.

You can also choose whether or not your spell effects are visible
outside the area; if you desire it looks from the outside as if
the normal conditions for the area continue inside, until someone
moves inside the spell area.

-- 
Dreamer
dreamer@??????.?????.??.uk
http://www.romsys.demon.co.uk/