Invincibility Leaf

Invincibility Leaf is a power up feature in Super Mario 3D Land and New Super Mario Bros. 2.

Super Mario 3D Land
The leaf  only appears after Mario loses five lives in a level that is not already completed. It will not appear when re-visiting a completed level or a Special World level. This means Luigi cannot obtain it in that game unless the player skipped any levels in the normal worlds (for example, by using a Warp Zone). Touching it will give Mario a shining white and golden Tanooki Suit, making him White Tanooki Suit Mario, and it will make him invincible, as the Star also does, but the invincibility lasts for the entire level.

New Super Mario Bros. 2
The leaf has the same effect as it did in Super Mario 3D Land. Instead f the Tanooki Suit, Mario and Luigi will get a white and golden outfit. The leaf can't be replaced by any other items.