Arianrhod's Magical Side-Effects
Whether calling upon her as dutiful, mystagogue, celestial, or all three, roll 1d12 and consult the table below. Requirements (if called for) are based on her aspects beyond that.
1. Gofyniad: Something is needed for the spell to work. Once given, it will.
2-3. Cymwynasgar: If something isn't provided, then the magic will only occur at 50% its usual strength.
4. Yn Araf: The spell will happen, but if the priestess doesn't perform a requirement, its effects will only transpire 2d3 turns later.
5. Teyrnas Arianrhod: All within 1d6 x 10' gain a +1d3 bonus to certain rolls for the next 2d6 rounds, depending on which one of Arianrhod's aspects is manifest (roll 1d3): [1] duty, [2] mystic initiation, or [3] night time firmament.
6-8. Awen Arwydd: Except for a possible, minor occurrence representing one or more of Arianrhod's aspects (a 50% chance), the spell works as usual this time.
9. Mad: The spell needs a requirement and will also have a 50% bonus to its effect, range, or duration. If not given, nothing will occur.
10. Gwell: The magic's effect, range, or duration can be boosted by 50% by adding a requirement. If that doesn't happen, then it simply works normally. In addition, if the priestess does add a requirement, then she can gain a +2d3 bonus for the next 1d6 rounds to certain rolls based on which aspect of Arianrhod most resonates with her: dutiful, mystagogue, or celestial.
11-12. Caer Arianrhod: The spell occurs for an additional 50% bonus (or 100% if a 12 is rolled) to its usual effect, range, or duration, as well as it not being expended that day. What is more, if the priestess is in a place where she is safe, then one of those spell elements may be tripled.
Requirements by Aspect
Roll either based on which part of Arianrhod the caster most resonates with or simply pick one at random.
Arianrhod Dutiful (d4)
The priestess must...
1. Hold or have held someone's feet within the last 1d6 turns, or the spell will otherwise hold the target.
2. Have remained virgin, or at least fully loyal to her husband.
3. Have given birth to a child associated with, or she herself is in view of, the sea.
4. Have given birth to a child associated with, or she herself is in view of, the sun.
Arianrhod Mystagogue (d3)
The spell's target must either not have used, or not been with something within the last 2d6 rounds (if not known, there's a base 50% chance), or will otherwise be so restricted via the spell (tynged)...
1. Their name.
2. A weapon.
3. A wife (or similar).
Arianrhod Celestial (d4)
The priestess must be located near or in view of...
1. The moon.
2. Stars.
3. The night sky.
4. Any silver wheel.
For example, a priestess of Arianrhod casts a spell and her player rolls a 9 (Mad). So in this case, she must perform a requirement to boost one of these spell's aspects by 50%. Wishing to boost its range thus, she rolls on the Arianrhod Mystagogue table since she most corresponds with that. She then rolls a 2 on it, so either the spell's target must not have used a weapon within the last 2d6 rounds, or the spell she is casting is specifically being used to prevent the target's use of a weapon.
For the full article, including magical side-effects by cleric type, see here.
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Next week: Priestesses of Arianrhod, Part III!