Stone Blooded

You have eaten numerous stones over time,  but through prolonged petrification, you have learned that stone has wormed its way into your physiology. These effects have mainfested in the following ways:

• Your blood hardens to a stone-like substance sometime after being exposed to air. When under half of your max hitpoints, you gain a +1 bonus to your AC from hardened blood reinforcing your body.
• Any petrification effects on you wear off after one minute, instead of being permanent. Additionally, if you undergo a full minute of petrification, you recover 20% of your max hp at its end.
  • Unfortunately, due to these healing effects, your body has become more susceptible to petrification, giving you disadvantage on saving throws against all forms of petrification.
• Once per day, you can use your stone blood to cast the spell Meld with Stone by expending 20% of your max hp in blood.