Superheated Blood

The Superheated Blood is a mount-summoning item that spawns a rideable Lava Shark. It is obtained by opening Obsidian Crates or Hellstone Crates found by fishing in lava.

Riding the mount will allow the player to swim very quickly in lava without taking damage. It can also swim in water and honey, but will not protect from drowning. It has a max speed of 73 mph in liquids and 11 mph on land.

The mount maintains its velocity in the air, allowing for jumps similar to while riding a minecart. When moving upwards or downwards, it tilts towards that direction.

Trivia

 * When not in fluid, the Lava Shark has saddened eyes.
 * Its tooltip, "Bloody Hell", is a reference to one of the most common English exclamations, most notably used by Gordon Ramsay.
 * The shark actually goes the same speed in water, honey, and lava.