The Pumping Heart of Nizchetus is a vampiric artifact.
This heart is said to be sealed in a green glass jar. The heart was that of a powerful Toreador, and some say the heart still beats, due to either its own magic or magic contained in the jar and its fluids. The heart is thought to bring good luck if kept on a mantelpiece in the owner’s haven, possibly lowering the owner’s difficulty numbers.
References
Players Guide to the Sabbat, p. 153-154