Black Ring Of Arista

Lose 1HP permanently when this ring becomes attached. Will leap up to 1 foot to attach itself
to a finger. Wielder touches another creature
and sacrifices 1HP to force the creature to make
a DC14 Con save or have their blood turned to
onyx. (As stone to flesh spell) (only reversible
wish or miracle) Backfire chance equal to HP
sacrificed that the ring turns on the wearer and petrifies its wielder.