Actions
Multiattack. Diorite makes 3 Eldritch Bolt attacks. Up to three of these attacks can be replaced by Stone to Flesh. She also makes one Sculptor's Claws attack.
Sculptor's Claws. Melee Attack Roll: +7, reach 5 ft. Hit: 6 (1d4 + 4) Slashing damage, and the target must succeed on a DC 15 Constitution saving throw or have the Restrained condition. The target can repeat the saving throw at the end of each of its turns, ending the effect on a successful save. If the target fails a saving throw against this ability while it has the Restrained condition, it instead has the Petrified condition. It can continue to make saving throws at the end of each of its turns, ending the petrification on a successful save.
Eldritch Bolt. Ranged Attack Roll: +7, range 120 ft. Hit: 9 (1d10 + 4) Force damage.
Stone to Flesh. Diorite ends the Petrified condition on one creature she touches. Diorite regains 16 (3d10) Hit Points and the newly un-Petrified creature has the Charmed condition for 10 minutes.
Spellcasting. Diorite casts one of the following spells, requiring no material components, using Charisma as the spellcasting ability (spell save DC 15):
At Will: Blade Ward, Mold Earth, Thaumaturgy
3/Day Each: Charm Person, Dispel Magic, Dissonant Whispers, Earthbind, Shield
1/Day Each: Dimension Door
Legendary Actions
Diorite can take 3 Legendary Actions, choosing from the options below. Only one Legendary Action option can be used at a time and only at the end of another creature’s turn. Diorite regains spent Legendary Actions at the start of her turn.
Diorite’s Fury. Diorite makes a Sculptor’s Claws attack or an Eldritch Bolt attack.
Belief in Stone. Intelligence Saving Throw: DC 15, one creature Diorite can see within 60 feet. Failure: 7 (2d6) Psychic damage and the target believes one of its arms has been turned to stone until the end of its next turn. While affected, the creature cannot make use of that arm or use an item it is holding with that arm (though it can switch a held item to a different hand).
Whispers of Stone (2 Legendary Actions). Wisdom Saving Throw: DC 15, each creature in a 20-foot-radius Sphere centered on a point Diorite can see within 60 feet. Failure: 7 (2d6) Psychic damage and is Frightened of Diorite until the end of its next turn.