Crone Statue

Raking Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 19 (3d10 + 3) slashing damage. 

Whirlwind of Claws (Recharge 6). All creatures within 5 ft. of the crone statue must make a DC 16 Dexterity saving throw, or take 19 (3d10+3) slashing damage and fall prone.

Touch of Age (Recharges after the statue first drops to fewer than half its hit point maximum). The crone statue targets one creature within 5 feet of it. That creature must make a DC 16 Constitution saving throw. If the target fails the saving throw, it takes 18 (4d8) necrotic damage, and any creature has resistance against the damage dealt by the target.
At the end of its next turn, the target repeats the saving throw. On a success, it ends the effect on itself. On a failure, the first effect persists and also the creature's speed becomes 10 feet if it was higher than that (it applies to any of the creature's movement modes) and the creature must repeat the saving throw at the end of its subsequent turn.
If the second saving throw is successful, both effects end on the target. If the second saving throw is failed, the effects become permanent (and the target appears to age) until cured by a remove curse spell or similar magic.