While the Invincibility Leaf was already revealed in our official art update, we now have a few more details as to what the Invincibility Leaf will do in New Super Mario Bros. 2. Just like in Super Mario 3D Land, the Invincibility Leaf will appear in a box once the player has died five times. The leaf will grant Mario and Luigi invincibility for the remainder of the level.
For a quick look at the Invincibility Leaf in Super Mario 3D Land, check out the video below:
http://www.youtube.com/watch?v=8_nxV_UGc_Q