Burden Breaker

The Burden Breaker is a Hardmode accessory dropped from Dungeon Guardians, or from Skeletron Prime when it is enraged in Revengeance Mode. When equipped, once the player reaches a horizontal speed of 25 mph, it accelerates the player by a factor of 2.5% per frame (roughly 4.4x speed per second), until either a solid block is hit or they achieve a speed of 2557 mph, at which point the player's speed is reset to zero.

Trivia

 * This is the only item with Turquoise rarity that is available before defeating the Moon Lord.
 * This accessory looks similar to the Determination Breaker.
 * Its description "The good time" is similar to the Determination Breaker's "The bad time."