This amulet is made of an unknown jade like material. A pattern resembling the shell of a turtle was carved into long ago and the spirit of a great tortle warrior resides within.
While you are wearing the amulet on a necklace, you may speak it’s command word. If you do, you’re AC becomes 23 and you gain advantage on strength and constitution saving throws, but your speed becomes 0 and can’t increase, you have disadvantage on dexterity saving throws, you can’t take reactions, and the only action you can take is a bonus action to speak the command word again to end this effect.
When you end this effect, roll a d20. On a 1, the amulet explodes sending shard in all direction. All creature within 15 ft. of the amulet must make a dexterity saving throw DC 19. All creature who fail this saving throw and anyone wearing the amulet take 1d4 piercing damage.