Shield of Cthulhu

The Shield of Cthulhu is an Expert Mode accessory from Treasure Bag dropped by Eye of Cthulhu. In order to use this item, the player must double-tap either the right or left key. The character will then run super fast to the right/left (similar to the Tabi) and deal 30 damage to any enemies you come into contact with for a short time. You will also be momentarily invincible. This effect does not apply at bossfights however: You will not gain invincibility while charging at a boss. Master Ninja Gear, Tabi and the Solar Flare Armor Set all override the Shield of Cthulhu's dash and will cause it to not work.

Tips

 * You can use the shield dash to boost yourself into your maximum run speed. Using it applies your boots' super fast running right after the dash.