Drain/absorb magicka ward spell, help please.

[FJMS1988]

Hello everybody, I want to create a new spell and I would be very happy if someone could help me with this. I want to create a ward spell which absorbs magic and physical damage like the existing ward spells but also drains magicka from the destruction spells the enemies use agains you. I have created a spell which absorbs magic and physical damage but I don't know how can I also drain magicka from the magic attacks. Do you have any idea, please? Thank you very much in advance.