Actions

Multiattack. The shard makes two Telekinetic Rend attacks.
Telekinetic Rend. Melee or Ranged Spell Attack: +12 to hit, reach 10 ft. or range 120 ft., one target. Hit: 15 2d8+6 force damage.
Inhabit Object. The shard disappears as it pours its psychic essence into a Medium or smaller nonsentient object it can see within 30 feet of it, magically possessing it. The object uses the shard's AC, and any damage dealt to the object applies to the shard's hit points. The shard inhabits the object until it uses an action to leave; until it is turned; until it is reduced to 0 hit points; or until an effect that ends possession, such as a dispel evil and good spell, is used on it. When it leaves the object, it reappears in the nearest unoccupied space.
While inhabited, the object becomes a magic item if it wasn't already, and a Tiny cracked gemstone matching the kind of gem dragon the shard was in life appears somewhere on the object. The shard can cause the object to fly using the shard's own flying speed, use its senses, speak verbally or telepathically, cast spells, and use its legendary actions.
If a creature wears or carries the inhabited object, the shard can grant the creature the following benefits:

• Each of the creature's attacks deals an extra 1d8 force damage on a hit.
  
• The creature gains resistance to psychic damage.

Psychic Crush (Recharge 5–6). The shard unleashes a pulse of psychic power. Each creature of the shard's choice in a 60-foot-radius sphere centered on it must make a DC 20 Intelligence saving throw. On a failed save, the creature takes 55 (10d10) psychic damage and is stunned until the end of its next turn. On a successful save, the creature takes half as much damage and isn't stunned.

Legendary Actions

The draconic shard can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The draconic shard regains spent legendary actions at the start of its turn.
Rend. The shard makes one Telekinetic Rend attack.
Cast a Spell (Costs 2 Actions). The shard uses Spellcasting.
Commanding Thought (Costs 2 Actions). The shard targets a creature it can see within 30 feet of it. The target must succeed on a DC 20 Wisdom saving throw or be charmed until the end of its next turn. While charmed in this way, the target becomes the shard's puppet, acting and moving in accordance with its telepathic commands. While under the shard's control, the target can take only the Attack (shard chooses the target) or Dash action on its turn.