Aegis of the Earth Heart

The Aegis of the Earth Heart is of celestial origin and serves as a prison for the Emerald Greatwyrm Sardior's Breath, whose mortal followers revere it as a god. Over time, Sardior's Breath’s psionic powers have warped the shield’s appearance, so that its celestial motif and designs have become more and more adorned with emarald layers and the dragon portrait subtly moves in curious ways.

While holding this shield, you gain a +2 bonus to Strength Score and resistance to psychic damage.

Sentience. The Aegis of the Earth Heart is sentient as long as it contains the spirit of Sardior's Breath. While sentient, the shield has the following properties:

• The shield has 1090 hit points, a Constitution of 34 (modifier +12), an Intelligence of 30 (modifier +10), a Wisdom of 36 (modifier +13), and a Charisma of 36 (modifier +13), as well as hearing and truesight out to a range of 120 feet. Saving Throws CON +20, INT +18, WIS +21, CHA +21 Skills Arcana +26, History +18, Perception +29 
  Damage Immunities Acid, Cold, Force, Lightning, Necrotic, Poison, Psychic, Radiant, Thunder; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
  Condition Immunities Charmed, Frightened, Poisoned, Prone
  Senses Truesight 120 ft., Passive Perception 39
  Languages Common, Draconic
  Proficiency Bonus +8
• The shield can speak, read, and understand Common and Draconic, and it can communicate telepathically with any creature it can sense within 120 feet of it. Its voice is a deep, calm whisper. The Shield can hover and move when not worn. (These aren't powers of the shield that the player can control.)
• Grasp of Earth and Mind. The shield has 3 charges. You can use an action to expend 1 charge to cast Maximilian’s Earthen Grasp or 3 charges to cast Telekinesis from the shield (save DC 19 for each, if the wielder has no spell save DC). The Telekinesis spell lasts for 10 minutes (no concentration required). The shield regains all expended charges on a long rest.
• Aura of Calm (this is a power of the shield, that is not under the wielder's control, but under the DM's control). Anytime during your turn, the shield can choose to radiate an aura of calm for 1 minute  Any creature hostile to you that starts its turn within 30 feet of the shield must make a DC 21 Wisdom saving throw. On a failed save, the creature is charmed until the start of its next turn. On a successful save, the creature is immune to this power of the shield for the next 24 hours. Once the shield uses this power, it can’t use it again until the next dawn.
• Psychic Step (this is a power of the shield, that is not under the wielder's control, but under the DM's control). The The Aegis of the Earth Heart magically teleports to an unoccupied space it can see within 120 feet of it.

Sardior's Breath’s Personality. Sardior's Breath desperately seeks to restore balance to the planes and the forces of nature. The Emerald Greatwyrm won’t reveal itself unless it is in it's interest. It drops hints and subtle suggestions to guide it's wielder down a path in it's grand plan.

It's content with it's current existence in the shield since it's power became to instable for the planes around it and until it finds a better way of containment it will try to further it's plans in this form.

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.

Notes: Bonus: Strength Score, Resistance: Psychic, to attune the character needs to understand draconic.