Amulet of Desidia

While wearing this amulet you exude a cloud of sluggishness in a 15ft sphere. Hostile creatures treat this area as rough terrain. When you attack a creature while wearing this amulet and roll a 19-20 on the attack roll, the creature must make a DC 15 Constitution saving throw in addition to suffering the attack’s normal effects. On a failed save, the creature is restrained and must make another Constitution saving throw at the end of each of its turns. If it successfully saves against this effect three times, the effect ends. If it fails its saves three times, it is turned to stone and subjected to the petrified condition for 1 hour. 

Sentient. This amulet contains a spirit of chaos named Desidia, that drives the wearer to laziness and apathy.

Curse. This amulet is cursed, and becoming attuned to it extends the curse to you. Until the curse is broken with a wish spell or similar magic, you are unwilling to part with the amulet and are subject to the following effects:

• Whenever you attack a creature and roll a 1 on the attack roll, you must succeed on a DC 15 Constitution saving throw or be restrained and forced to make additional saves against being petrified, as above.
• You have disadvantage on all initiative rolls.
• Your speed is reduced by 10ft.

Notes: Speed Reduction: Impose, Buff, Warding, Jewelry