Power Star

Power Stars are rare items that grant users pure invincibility, rendering them invulnerable to damage for a limited amount of time; enemies who come in contact with those in possession of an activated Power Star are instantly destroyed. In addition, the user is given increased running speed. In the "Dimension" saga, a Power Star is used twice—once by Mario and Luigi against Wario during the Raid on Toad Town, and once by Yoshi against Gemerl on Dinosaur Land five years later (though in this case, the limited time for invincibility prevents Yoshi from completely defeating the android).