She's cased in steel; she has a heart of marble.

With that mace the son of Pandu crushed men and steeds cased in steel armour.

There sat the Elector of Saxony, in full armor, on his horse, which was likewise cased in steel.

The arrogant nephew and his two drawcansir uncles appeared so completely cased in steel that they and their steeds were like moving masses of iron.