First fire, now lightning. This was starting to be entertaining. Zuno decided the chaos below needed a little more fun. Zuno/cat twitched his tail and concentrated on drawing water onto the white-hot shield - spontaneous magic (Control/Water - 4-1-2) (2 shifts).
3-2-2
Sea water rushed onto the melting shield. As the water touched the shield, it instantly turned into steam. After a minute, all the water pulled from the sea by the spell has evaporated. Only a black lump of iron was on the ground where the heated shield once was.