From V Rising Wiki
Creature Heart
Stackable
Tier 0
The blood-filled heart of a dead being
Properties
Max Stack: 10
Stackable
This item can be stacked up to a certain number. Meaning this item will consume one space in your inventory until the max stack amount is reached. Upon reaching max stack amount if your inventory is full it cannot be looted and will prompt a message on your screen saying "Inventory Full". Max stack size can be adjusted by the server admin to be increased or decreased.