The Clockwerk Heart was one of the parts that helped Clockwerk survive for thousands of years. It functioned as a powerful pump that was tireless and never wore out.
Sly 2: Band of Thieves
Rajan utilized half of the heart to accelerate Rajan's Illegal Spice Operation by at least ten times more than normal production, making spices grow at much faster rates than normal. He equipped the other half of this part to his staff and carried it around with him at all times. Using it, he was able to conjure lightning from the sky and manipulate it for an attack.
Both halves of the part had been stolen from Rajan by the Cooper Gang and was later found by Jean Bison who in turn sold the Heart along with the other Clockwerk Parts to Arpeggio.
Murray with the first half of the Clockwerk heart.
Sly with the second half of the Clockwerk heart.
Picture of the first half of the Clockwerk heart.
Picture of the second half of the Clockwerk heart.