Chromatic Cloak

The Chromatic Cloak is a Hardmode accessory which allows a more controlled Shimmering. When equipped, touching Shimmer does not immediately inflict the Shimmering debuff, and the player can instead start Shimmering at any time by holding the key. However, after Shimmering starts, it cannot be interrupted anymore, not even by re-equipping the Chromatic Cloak.