This is Queen Ocuro's second form which is substancially more powerful than her first form.
In her second form she has control of fire and air she has all of the makuta abilities and she has the ability to transform into an even more powerful form. Queen Ocuro has 5 forms each one more vicous and powerful than the last. Queen Ocuro ascends to this form after her first form is stressed beyond its limits all the energy absorbed by her first form is concentrated along with chambered energy within the first form's body outside of the body to form a hideously powerful being with unimaginable power and intelligence.
About this creation
For Queen Ocuro to properly transform into her third form she must absorb her 1st form into her second form if this is not done correctly the power of the third transformation could kill her.