Firestorm Boots

The Firestorm Boots are a Hardmode accessory that combines the effects of Frostspark Boots and Lava Waders, and grants even more movement speed and flight time. Wearing these boots alone will allow the player to reach up to 35 mph while running on the ground. It is crafted at a Tinkerer's Workshop. Because one of each of the Mechanical Bosses souls are needed, this accessory can only be obtained after all three have been defeated.

Trivia

 * Unlike its components, the Firestorm Boots do not leave a trail when the wearer reaches maximum speed.