Nyan Kajan (Late) (5e Creature)
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Late Game Nyan Kajan
medium humanoid (Tabaxi), chaotic good
Saving Throws Constitution +11, Intelligence +11, Wisdom +8
Arcane Recovery. Once per day when Nyan finishes a short rest, he can choose to recover up to 10 levels worth of expended spellslots. None of the spellslots can be 6th level or higher. For example, he might recover two 5th-level spellslots, or four 1st-level spellslots and three 2nd-level spellslots, etc.
Feline Agility. When Nyan moves on his turn in combat, he can double his speed until the end of the turn. Once he uses this trait, he can't use it again until he moves 0 feet on one of his turns.
Lightning Toughness. Nyan has an additional 10 ft. of movement speed, 1 additional point in his Constitution score and proficiency in Constitution saving throws, and 40 maximum hit points, included in his above stats. Additionally, when he uses the Dash action, difficult terrain doesn't cost him extra movement on that turn, and when he makes a melee attack against a creature, he doesn't provoke opportunity attacks from that creature for the rest of the turn, whether he hits or not.
Minor Alchemy. Nyan can temporarily alter the physical properties of one nonmagical object, changing it from one substance into another. He perform a special alchemical procedure on one object composed entirely of wood, stone (but not a gemstone), iron, copper, or silver, transforming it into a different one of those materials. For each 10 minutes he spends performing the procedure, he can transform up to 1 cubic foot of material. After 1 hour, or until he loses his concentration (as if he was concentrating on a spell), the material reverts to its original substance.
Signature Spells. Nyan always has the counterspell and haste spells prepared, they don't count against the number of spells he can prepare, and he can cast each of them once without expending a spellslot. If using the homebrew spell nyan's ball lightning, it is his Signature Spell instead of counterspell. If he casts either spell at a higher level, he must expend a spellslot as normal.
Spell Mastery. Nyan can pick a 1st-level spell and a 2nd-level spell in his spellbook and cast those spells at their lowest level without expending a spellslot while he has them prepared. By spending 8 hours in study, Nyan can exchange one or both spells with different spells of the same levels. Typically, Nyan chooses shield and alter self for this feature.
Transmutation Savant. The gold and time Nyan must spend to copy a transmutation spell into his spellbook is halved.
Transmuter's Stone. Nyan can spend 8 hours creating a transmuter's stone that stores transmutation magic. He can benefit from the stone himself or give it to another creature. A creature gains a benefit of his choice as long as the stone is in the creature's possession. When he creates the stone, he chooses the benefit from the following options:
Darkvision out to a range of 60 feet.
Each time he casts a transmutation spell of 1st level or higher, he can change the effect of his stone if the stone is on his person. If he creates a new transmuter's stone, the previous one ceases to function. Nyan typically wields his Transmuter's Stone himself, choosing the 10 ft. increase to speed as his primary benefit, though he is smart enough to change it to resistance if a creature wields a particular damage type against him and the resistance outweighs the speed benefit.
Master Transmuter. Nyan can use his action to consume the reserve of transmutation magic stored within his transmuter's stone in a single burst. When he does so, he chooses one of the following effects. His transmuter's stone is destroyed and can't be remade until he finishes a long rest.
Major Transformation. He can transmute one nonmagical object-no larger than a 5-foot cube-into another nonmagical object of similar size and mass and of equal or lesser value. He must spend 10 minutes handling the object to transform it.
Shapechanger. Nyan can cast polymorph without expending a spell slot. When he does so, he can target only himself and transform into a beast whose challenge rating is 1 or lower. Once he casts polymorph in this way, he can't do so again until he finishes a short or long rest, though he can still cast it normally using an available spell slot.
Spellcasting. Nyan is a 20th-level spellcaster. Intelligence is his spellcasting ability, and he can prepare 25 (Not including Signature Spells) of the following Wizard spells using his spellbook:
Cantrips (at will): chill touch, fire bolt, mage hand, mold earth, shocking grasp
Homebrew Spells. If using homebrew spells, Nyan canonically invents the following spells, and usually has them prepared over spells of similar use and level (Such as preparing Ball Lightning instead of Fireball). When he prepares these spells, they do count against the total number of spells he can prepare.
Homebrew Items. If using homebrew items, Nyan canonically invents Nyan's gambit, an item which he wears and uses. If he does, he probably always has magic missile prepared in order to benefit from the glove. When Nyan casts magic missile while attuned to and wearing this fingerless leather glove with a sapphire embedded in it, the spell produces one more magical dart per level of the spellslot spent to cast it, and the damage type of the spell changes to lightning damage. If Nyan uses this item in combat, his CR raises by 1 (CR 13, 10,000 XP).
Dagger. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 8 (1d4 + 5) piercing damage.
Late game plot hooks for using this NPC include, but are not limited to, helping him make an incredibly difficult potion such as a permanent potion, helping him after a mishap with the Nyan's light speed dash spell (Before he properly finishes inventing it) has left him stuck moving really quickly and being incapable of interacting with the world normally (See the spell's effect and use your imagination to determine how a warped imperfect version of the spell might become a detriment), helping him with an experiment(s) to try and improve his transmuter's stone (What could possibly go wrong?), or helping him face a thief who stole Nyan's gambit from him. For some reason, Nyan Kajan refuses to help the party fight the thief and insists that they don't ever mention their relationship to him if they're caught trying to steal it back, or if they confront the thief directly. He almost seems... afraid? As an alchemist looking to sell through his magic item shop, helping Nyan might earn the party a free sample magic item or two, which could even be a special request like making a second Nyan's gambit for the party to use or another custom magic item the DM approves of. If you want an early game version of this statblock, see Nyan Kajan (Early) (5e Creature) .