homebrew by Team Brievary
Innate Spellcasting. The kitsunes's innate spellcasting ability is Wisdom (spell save DC 12). The kitsune can innately cast the following spells, requiring no material components:
Martial Advantage. Once per turn, the kitsune can deal an extra 7 2d6 damage to a creature it hits with a weapon attack if that creature is within 5 feet of an ally of the kitsune that isn't incapacitated.
Multiattack. The kitsune can make two greatsword attacks. Greatsword. Melee Weapon Attack: 6+ to hit, reach 5ft., one target. Hit: 11 2d6+4 slashing damage. Change Shape. As an action, the kitsune magically polymorphs into a fox, 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.