Unusual Training. The GemBlade can go for up to 1 week without food, water, or sleep before suffering detrimental consequences.

Swift Retribution (Recharges after a Short or Long rest). When an ally is wounded within 60 feet of the GemBlade, the GemBlade's speed doubles for the next round if they move to help the ally.

Multiattack. The GemBlade makes three melee attacks.

Crystal Shard. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 12 (1d6 + 9) slashing damage.

Leadership (Recharges after a Short or Long Rest). For 1 minute, the GemBlade can utter a special command or warning whenever a nonhostile creature that it can see within 30 feet of it makes an attack roll or a saving throw. The creature can add a d4 to its roll provided it can hear and understand the GemBlade. A creature can benefit from only one Leadership die at a time. This effect ends if the GemBlade is incapacitated.

Moonshard Parry. The GemBlade adds 2 to its AC against one melee or ranged attack that would hit it. Alternatively, it gains +2 on one saving throw against a spell or other magical effect.