What kinds of supernatural beings are in the Bible? The Bible mentions a number of supernatural beings, starting with the most commonly known ones - God, angels, spirits, but there are also ones that appear less often, like witches (Witch of Endor), or giants (Nephilim).

Is there a comprehensive list of supernatural beings that appear in the Bible along with descriptions of what they are?

EDIT:

As for defining supernatural, lets assume anything that is not part of the natural world, that is, grounded in reality outside of religion. Humans are natural, animals are natural, people worshipping other gods (like wiccans or baalists) are natural, people performing miracles (like Witch of Endor) are supernatural, just like angels, half angels, spirits, etc. In the end, anything not conforming to natural laws is supernatural.
The definition of supernatural is pretty important here.  If it refers to anything that is not in the physical world, then angels and demons could be considered supernatural.  If it refers to anything outside the scope of common experience to modern society, then the Nephilim could be considered supernatural.  

Perhaps a good definition for supernatural would be anything that is outside the physical universe of time, space, and matter.  In that case, only God is supernatural, since even angels and demons seem to exist within the physical universe.  Most often, they are hidden from our view, but not always.

If the definition is expanded to refer to any beings for which earth is not their home, then angels and demons are added to the list.

Witches exist today.  They are people who practice certain rituals and such.  They are not supernatural themselves, but they seek to facilitate demonic powers, which can be considered supernatural.  So, the powers they seek to use are supernatural, but they themselves are natural.

The Nephilim could very well be normal human beings.  It is really speculation to firmly classify them one way or the other, since we just aren't told enough about them.

So, God is supernatural.  Angels and demons could also be considered supernatural, and this would include the Seraphim, Cherubim, and other angelic beings mentioned in Scripture.  Outside of that, I don't really know of any beings that are considered supernatural.