Calculator

Legendary Resistance (3/Day). If the Calculator fails a saving throw, it can choose to succeed instead.

Magical Guidance. When the Calculator makes an ability check that fails, they can spend 1 sorcery point to reroll the d20, and they must use the new roll, potentially turning the failure into a success.

Metamagic Master. A Calculator can easily twist their spells to suit their needs, using their 24 Sorcery Points (SP) to do so. They can use up to two (2) Metamagics per casting of a spell unless otherwise stated.

   Calculated Spell. When casting a spell, the Calculator can use their mastery of spacetime to ignore the range of that spell and instead cause the spell to hit every living creature that they can see that possess a certain mathematical quality within a 300 foot range of the Calculator. They spend a number of SP equal to the spell's level, then choose 2 parameters that a creature must possess to become an automatic target; Factor and Quality.
   The Quality corresponds to one of ten values on a creature's stat block or character sheet; any of the 6 Ability Scores, AC, current HP, maximum HP, or number of available Spell Slots remaining. The Factor is what the Quality is divisible by without producing a fraction/decimal, and can be any single-digit number from 3-5. However, each Factor has a limited number of times it can be used before a long rest is needed; 5 with 4 uses, 4 with 3 uses, and 3 with just 2 uses. A spell cast this way cannot be countered except by a 9th level Counterspell or Wish spell.  
     Example: The Calculator spends one level 7 spell slot as well as 7 Sorcery Points upon casting the Thundaga spell, then selects (Max HP, 4) for the spell's parameters instead of selecting the center point for the radius of the normal spell. The spell then instantly affects all living creatures that the Calculator can see with 300 feet of them whose Maximum HP is divisible by the number 4 (no cylinders or AoE style blasts are produced when spells are Calculated).
   Transmuted Spell. When casting a spell that deals a type of damage from the following list, they can spend 1 SP to change that damage type to one of the other listed types: acid, cold, fire, lightning, poison, thunder.
   Quickened Spell. When casting a spell that has the casting time of 1 action, they can spend 2 SP to change the casting time to 1 bonus action for this casting. 

Spellcasting. The Calculator is a 22nd-level caster. Their spellcasting ability is Intelligence (spell save DC 24, +16 to hit with spell attacks) and has the following spells prepared:

Cantrips (at will): Firebolt, Guidance, Ray of Frost, Sacred Flame, Shocking Grasp, Spare the Dying, Toll the Dead
1st level (4 slots): Absorb Elements, Chromatic Orb, Cure Wounds, Guiding Bolt, Shield
2nd level (3 slots): Hold Person, Lesser Restoration, Misty Step, Scorching Ray
3rd level (3 slots): Counterspell, Dispel Magic, Fireball, Fly, Haste, Revivify, Slow
4th level (3 slots): Aura of Life, Banishment, Freedom of Movement, Wall of Fire
5th level (3 slots): Cone of Cold, Greater Restoration, Mass Cure Wounds, Wall of Force
6th level (3 slot): Firaga, Heal
7th level (2 slot): Reflect, Thundaga
8th level (2 slot): Blizzaga, Power Word Stun
9th level (1 slot): Flare, Power Word Heal, Power Word Kill
10th level (1 slot)

Unusual Nature. The Calculator doesn’t require food or drink.

 +3 Quarterstaff. Melee Weapon Attack: +11 to hit, reach 5 ft., 1 target. Hit: 9 (1d8 + 4) bludgeoning damage. 

Bastion of Law.  As an action, the Calculator can expend 1 to 5 sorcery points to create a magical ward around themselves or another creature they can see within 30 feet of them. The ward lasts until they finish a long rest or until used again.

The ward is represented by a number of d8s equal to the number of sorcery points spent to create it. When the warded creature takes damage, it can expend a number of those dice, roll them, and reduce the damage taken by the total rolled on those dice.

 Flexible Casting. Grants the following Sorcerer abilities:

• Creating Spell Slots via Sorcery Points
• Converting Spell Slots into Sorcery Points

Trance of Order (1/Long Rest OR 5 SP). As a bonus action, the Calculator can align their consciousness to the endless calculations of Mechanus for 1 minute. For the duration, attack rolls against them can't benefit from advantage, and whenever they make an attack roll, an ability check, or a saving throw, they can treat a roll of 9 or lower on the d20 as a 10.

Once they use this bonus action, they can't use it again until they finish a long rest, unless they spend 5 sorcery points to use it again.

Cast a Spell. Absorb Elements, Counterspell, Shield

Restore Balance (7/Long Rest). When a creature that the Calculator can see within 60 feet of them is about to roll a d20 with advantage or disadvantage, they can use their reaction to prevent the roll from being affected by advantage and disadvantage.

The Calculator can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The Calculator regains spent legendary actions at the start of its turn.

Calculation. The Calculator learns which creature did the most damage between their most recent turn and now, as well as that creature's Maximum HP. 
Cantrip. The Calculator casts a cantrip.
Cast a Spell (Costs 2 Actions). The Calculator casts a level 4 or lower spell using a Factor of 5 paired with any Quality of their choice. 
Chaos Cast (Costs 3 Actions). The Calculator rolls a d6, a d8, a d10, then casts a spell using the corresponding parameters:

• d6 result is the Ability Score used as the Quality (STR=1, DEX=2, etc.)
• d8 result is the Factor used to divide into the Quality. Rolling a 1 or 2 is a re-roll.
• d10 result determines the level spell slot used, the specific spell being whichever is first on their list for that level. Rolling a 10 is a re-roll. 

If the Calculator doesn't have the Sorcery Points or Spell Slots required for the Chaos cast, the spell still goes through, but the Calculator takes damage equal to the five times the spell's level that was cast.