Tuesday, October 16, 2018

Ley Lines, Nexus and Astronomical Alignments for GURPS 4th


LEY LINES
         These are lines along which flow a worlds mana. Sometimes this power crests to the surface, in amounts that can be used.

Frequency and Appearance
            In any given 10,000 square mile area (100 x 100 miles), there will be several random ley line segments. When they surface, it will generally run for an average length depending on the overall mana sphere.
Mana Level
Frequency of Ley Lines
   Very High Mana
3D6/10,000 sq. miles
   High Mana
2D6/10,000 sq. miles
   Normal Mana
2D6/10,000 sq. miles
   Low Mana
1D6/10,000 sq. miles
   No Mana
1D3/10,000 sq. miles
            The exact distance they run above ground and available is also related to the mana level of the world.
Mana Level
Distance
   Very High Mana
3D6x10 miles
   High Mana
2D6x10 miles
   Normal Mana
1D6x10 miles
   Low Mana
1D6x5 miles
   No Mana
1D6 miles
            At times the width and height of the ley line is also important, both are determined, separately, by overall mana levels.
Mana Level
Width
   Very High Mana
3D6 yards
   High Mana
2D6 yards
   Normal Mana
1D6 yards
   Low Mana
1D6 yards
   No Mana
1D3 yards
            The energy of a ley line will continually boost the magic points of a character by one point per rank of the ley line, which is determined by the overall mana level of the world in question.
Mana Level
Line Levels
Roll
   Very High Mana
5-10
1D6+4
   High Mana
3-8
1D6+2
   Normal Mana
1-6
1D6
   Low Mana
1-3
1D3
   No Mana
0-2
1D3-1
            Ley line energy radiates power in the area around the line. Outside of the immediate line, and for each additional mile, the available power is reduced by 2, until there is no additional mana available.



NEXUS
            Nexus form in areas where two or more ley lines converge.
            The number of nexus points per 100x100 mile area is listed as a percentage of the number of ley lines. For example, if there are 10 ley line segments and a rating of 20% for nexus points, there would be 2 places where ley lines cross in that region.
Frequency of Nexus Points
2d6-2x5%
            As for how many lines flow into the nexus, that is left for the GM to determine. Alternatively, nexus can be broken down into three categories, minor, moderate and major.
Nexus Type
Roll
   Major
6
   Moderate
5-4
   Minor
1-3
            The type of nexus determines how many lines intersect.
Nexus Type
Number of Lines
   Major
3D3+1
4-10
   Moderate
2D3+1
3-7
   Minor
1D3+1
2-4
            These places of power often have power far outside of the lines flowing into them. The mana from each line is added and then multiplied based on the overall mana of the world. The higher the base level of the world the more additional mana is drawn to the surface by the nexus.
Multiplier of available power
1d6-1x5%
            The base diameter is the width of the largest ley line flowing into the nexus plus an additional 10% of all the lines that intersect.


ASTRONOMICAL PHENOMENON
            Certain astronomical phenomenon cause surges along ley lines and nexus.

Noon and Midnight
            The most common surges occur daily, at noon and midnight. For a half hour on either side of the clock striking twelve, the points available increase by 10%.

Equinox and Solstice
            The vernal and autumnal equinox are two time a year where day and night are equal length. On the other hand, Solstices are when the sun is at the closest (summer) and furthest (winter).
            During the twenty-four-hour period all points available are increased by 50%.

Eclipses
            A lunar eclipse is when the planet passes directly between the sun and the moon. Typically, they last around ninety minutes, and during this time the available points are increased by 25%.
            Solar eclipses are when a moon or other body passes between the planet and the sun.
            Partial eclipses are when only a fraction of the sun is blocked (at least 50%). They don’t last long though, only around ten minutes. But they spike the available mana by 75%.
            Total eclipses are just that, the interposing body completely covers the sun. They are even briefer than partial solar eclipses, lasting two to eight minutes. But they are the most powerful of the common astronomical occurrences. Double all available mana.
            A solar eclipse created by more than one moon in alignment will raise the mana available by an additional 10% for each moon past the first.
            Of course, if the world has no moon, then eclipses are impossible.

Planetary Alignments
            Two or more moons aligning will raise the mana by 25% +15% for each moon after the second.
            When three or more planets, including the one with the lines in question, align, it causes a surge in power. Each planet in the alignment raises the mana available by 10%. They also last anywhere from 30 to 180 minutes (3D6 x 10).

Solar Alignments
            Multiple suns aligning raise the ambient mana by 25% per sun. So, during the few minutes of a triple solar alignment the mana peaks at an additional 75%.

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