Sinister heartbeat (Patreon)

The echoes of quiet steps linger deep down in dungeons of Scarweald Castle. A man wearing a bloodstained labcoat moving confidently from one desk to another mumbling some strange words in low voice. One can hear a soft humming of weird gizmos that are all around the underground lab. Dim tungsten lights flicker under the vaulted archs.
A man clasps something in his hand. When eyes are finally adjusted to the twilight, one can see that in his hand he's holding a heart. Just like the heart of his dearly beloved that stopped beating on the darkest day few years before. A heart he's desperately trying to replace at nights... and who knows - maybe this time he will finally succeed...

Update : Thank you for the idea! I've added an alternative variation with a smaller base. It's available via same link.

 (This character is  already  available (pre-supported) via the link in the pinned post)