What about a shield that only blocks physical damage?

ITT: Pantheon and Fiora do not count.

Kassadin and Morgana have shields that don't work against physical damage, but absorb large amounts of magic damage to compensate. This gave me a thought: What if there was a shield spell that did the opposite and only absorbed physical damage, but was ineffective against magic?

Not sure what kind of kit I'd put it on, but honestly it could produce some interesting results.