Heart of Vlad

Otherwise known as the Heart of Vlad, the heart of Dracula is one of the five body parts of the evil dark lord scattered about after his death and carefully watched over by his loyal servants until his ressurrection. It is unclear how often his body is seperated into pieces, but it has happened within the games at least twice so far (in both Castlevania: Simon's Quest and Castlevania: Harmony of Dissonance).

Simon's Quest
You can find this organ at Rover Mansion deep within. As important an organ it is, it is strangely left ungaurded by any of Dracula's strongest minions. It is one of the five necessary body parts needed in order to fight Dracula at the end of the game.

It's only other in-game function is to get the ferryman in Dead River to take you to Brahm's Mansion.

Harmony of Dissonance
In this title, it can be found in the Castle B version of the Sky Walkway in a hidden room located behind the save room just below the boss chamber. It is a relic that negates petrification.