Multiattack

The kamaitachi makes two sickle paw attacks.

Sickle Paw (True Form Only)

Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 18 (4d6 + 4) slashing damage.

Wintry Assault (Wintry Swirl Form Only)

Each creature in the kamaitachi's space must make a DC 15 Dexterity saving throw. On a failure, the creature takes 9 (2d8) slashing damage plus 9 (2d8) cold damage and is blinded until the end of its next turn. On a success, it takes half the damage and isn't blinded.