Throwing thunder and lightning is beyond the average Satanist, this is something a God could do, not a magnum opus but someone with a thousand years of meditation.
At most you can raise your kundalini and acquire enough energy to burn things with bioelectricity.
Mantras and squaring serve to strengthen the soul, but it's not guaranteed that you'll gain perfection if you direct your energy towards them.
It's likely to have no or very little effect