Arithmancy
One of the "Lei" category of magics;
If Arcane is spells on demand, and Jent Ghun is constant effects; Arithmancy is pre ordering.
The Soul sea itself has a memory, a concept of the world and an understanding of tropes within itself. By learning these trends, it's possible to predict them, or even influence them. New practitioners of Arithmancy typically focus on the understanding of the effects of things, or the meta-causes of certain events in the past.
A practitioner of Arithmancy is called an "Analyst"
Extremely adept practitioners of Arithmancy are sometimes called "Chronomancer"s
Mechanics
All effects have a DC and a Delay. Whether the check succeeds or fails, you can’t attempt again until after the delay passes.
Flavour
Rolled For
Special Rules
Example tools
The most common tools for arithmancy checks are abacus(d4, TDC 0), measuring tools(d4, TDC 20), and starcharts(d6, TDC 15)
Powers
Tier 1
- Chronomantic touch[You may attempt the Haste arithmancy effect.]
- Designer[You may attempt to create Arithmantic items.]
- Einodian craft[You always have a d4 tool when attempting Arithmancy checks regarding einodian horrors.]
- Evaluate[You may roll Arithmancy to determine the magic skill used to create an effect.]
- Individual Notebook[Whenever you gain momentum from an Arithmancy check, add 1 to this power to a maximum of your Arithmancy tier. You can use this power as an Arithmancy tool with the smallest die capable of rolling the total.]
- Plan ahead[When you create a 'plan' effect, all allies affected by the plan gain a +1 aid die bonus.]
- Universal Mathematica[You may attempt the Examine action using Arithmancy.]
Tier 2
- Arithmantic specialty[If you have specialty with an arithmancy effect, you add your Arithmancy tier to any opposed rolls that effect calls for.]
- Calculus Stepping[When aided on Arithmancy checks, the creature aiding you may choose to grant you either an aid die as normal, or a +2 aid bonus.]
- Dragon code[You may use your Arithmancy defence against all effects created by dragons.]
- Exemplary Divination[When you succeed at an Arithmancy roll where the amount you succeed by affects the result, you may spend 1 momentum to increase this exceeding amount by 50%.]
- Perfect Weakpoint[All picks you wield have the ‘Aiding(P)’ property]{PICKS}
- Programatic use[Once per day you may reroll an Arithmancy tool die]
- Right paths[Instead of moving during your movement phase in combat, you may distribute your speed to any number of allies.]
Tier 3
- A mind for it[You may use your Arithmancy defence instead of Willpower defence against Arithmancy effects.]
- Breakdown(Evaluate)[You may roll Arithmancy to determine the magic skill used to create an item or the magical abilities of an item.]
- Calculus[Select one kind of magic other than Arithmancy. When you benefit from an Arithmancy effect, you gain a d4 tool die when attempting checks with that kind of magic.]
- Fluid Plan(Plan ahead)[Creatures affected by Plan ahead increase their aid die minimum by 1 if they are aided by someone other than the plan.]
- Highly educated[You may use Education tools for Arithmancy and vice versa.]{EDUCATION}
- Student of the sea[Select one skill that is not a magic, or species skill, you may use your Arithmancy tier for that skill's abilities that call for tier, rather than the skills actual tier.]
- Study the Student(Evaluate)[You may roll Arithmancy against a creature's Willpower Defence or its choice of magic defence. On a success you learn the value and tier of its most powerful magic skill.]
Tier 4
- Aligned Armour[Craft magic heavy armour that cannot be dispelled.]{HEAVY ARMOUR}
- Calculus Lead(Calculus Stepping)[A creature granting you an aid bonus due to Calculus Stepping may instead grant you their Arithmancy tier as a bonus if it is greater than 2.]
Tier 5
Tier 6
Tier 7
Tier 8
Tier 9
Effects
Some effects have 'plan' keyword, so long as the plan is followed, the effect continues.
Analyze lore[DC 19, Delay 1 week]: Functions as the examine action on a creature or person you cannot see.
Arithmantic Study[DC TradeDC, Delay 1 week]: Learn the capacities, powers, and effects of a magic item or magical effect or location.
Decrypt Disease[DC 7]: The target of your effect rolls a number of defences against a disease they are suffering equal to 1+ your arithmancy tier. You are aware which of these defences will succeed or fail. These prerolled defences, in order, are used in place of the subsequent actual defences.
Signs of faith[DC 22, Delay 20 minutes]: You determine the major faith presented by whatever group of creatures typically lives in the area you are performing this effect. If the highest faith tier among such creatures is lower than your Arithmancy tier, you learn that tier.
Silent plan[DC 18, Delay 4 hours, plan]: Up to 1 creature + your tier gain a d6 tool die on stealth and senses checks. So long as all participants can see each other, should combat begin during the plan, all affected creatures add half your tier to their initiative.
Sweep and clear tactic[DC 15, Delay 2 hours, plan]: For a specified block of up to 1 hour per tier, all specified creatures in the plan gain a d6 tool die on senses checks and to their initiative value when a fight breaks out. This plan cannot affect the same creatures more than once per week.
Haste[DC 9, Delay 1 minute]: Target creature may make one additional movement phase or attack phase action on its next turn.
Uneven position[DC 23, Delay 1 day]: Target creature takes 1 point of damage to its position each time it fails an argument until it succeeds at an argument by 10 or more.