undamageable

I was damaged in a spaceship crash, and then Mac fixed me so that I would be undamageable, you see.

The Norby Chronicles Asimov, Janet & Asimov, Isaac 1983

Eventually, every available space in the ship was flooded with a complicated assemblage of gear, ranging from the comparatively undamageable wireless masts occupying a portion of the deck amidships, to a selection of prime Australian cheeses which filled one of the cabins, and pervaded the ward-room with an odour which remained one of its permanent associations.

The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Douglas Mawson 1920

"Don't you think you might have special hats for matinées -- something undamageable."

Our Stage and Its Critics By "E.F.S." of "The Westminster Gazette" Edward Fordham Spence 1896

In phase 2, Deathwhisper has an AoE Frostbolt attack and untargetable, undamageable adds

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