To do this, add Blood Essence to the Castle Heart by interacting with it.

This will power the Sawmill and all other automated buildings you’ve placed down in your castle.

Without Blood Essence, you’re able to’t use these buildings, and yourCastle Heart will decay.

The player in V Rising interacts with a Sawmill inside their castle.

Then return to it and pick up everything in the “Output” grid together.

The first panel simply indicates whether or not the Sawmill is powered by a Castle Heart.

Cover image for YouTube video

A screenshot from V Rising, with the player’s inventory on the left and the interaction panel for the Sawmill building on the right.