Floating: It's like if flight and swimming had a lazy baby. It is an uncommon ability, usually seen from the Spectral armies of Therodos or other ghosts, making them slightly more mobile than other undead options.

Specifically, floating allows:

• Crossing of river and mountain pass province boundaries at no movement penalty
• Immunity to the conjuration 8 spell Earth Attack
• Does floating grant immunity to earthquake? How about tangle vines? A comprehensive list of spells would be nice.
• Does floating work underwater?