homebrew by Team Brievary
Innate Spellcasting. The Nekomata's innate spellcasting ability is Charisma (spell save DC 13). The Nekomata can innately cast the following spells, requiring no material components:
At will: chill touch, farie fire
2/day: animate dead
Spellcasting. The nekomata necromancer is a 12th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 15, +7 to hit with spell attacks). The necromancer has the following wizard spells prepared:
Cantrips (at will): chill touch, dancing lights, mage hand, mending
1st level (4 slots): false life, mage armor, ray of sickness
2nd level (3 slots): blindness/deafness, ray of enfeeblement, web
3rd level (3 slots): animate dead, bestow curse, vampiric touch
4th level (3 slots): blight, dimension door, stoneskin
5th level (2 slots): Bigby's hand, cloudkill
6th level (1 slot): circle of death
Grim Harvest (1/Turn). When necromancer kills a creature that is neither a construct nor undead with a spell of 1st level or higher, the necromancer regains hit points equal to twice the spell's level, or three times if it is a necromancy spell.
Withering Touch. Melee Spell Attack: +7 to hit, reach 5 ft., one creature. Hit: 5 2d4 necrotic damage. Change Shape. As an action, the Nekomata magically polymorphs into a two tailed cat, or back into its true form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.