Ostinato

OstinatoDefault DataArmor

Koopa Shells

These are the shells worn by the various shelled creatures of the Mario world, from Koopas to Nokis. Generally speaking they are lightweight and longevous but offer only a small defensive bonus. Notably the shells of Buzzy Beetles give the wearer an immunity to Fire-type attacks; this is in contrast to the Elemental Armor, whose Elemental Modifiers only apply to damage taken by the armor itself, not the person wearing it.

Technically, I counted shell-spinning as a Unique field ability for Koopas (used for crossing hazards), so it would make some sense to grant players this ability if they wear a shell, but you could justify not giving it to them by saying that they don't know how to spin properly, since it is something of a mystery how Koopas actually do that. The latter is the way I've written it up. See also flipping.