This card itself is not that remarkable, but I saw the flavour text, and thought I had to look at it today. For those who don't know (I'm going to assume that's mostly everyone), Lord Ursnell was a lord in Terisiare (a northern continent on Dominara). Because of all the screwing-over-of-the-local-population caused by Urza and Mishra's little spat over a Thran powerstone, Terisiare was pretty much reduced to ash and a lot of little battle scarred the land. The Battle of Pitdown was one of those battles and Lord Ursnell died, and not much outside of his skeleton was left. When it was returned to Lady Ursnell, I guess she decided to try her hand at instrument making (much more of the story was focused on Jodah).
As for this card, it's not bad. Kind of like a Cumber Stone with a toggle switch that costs mana. Not great, but not horrendous.
Pros: Cumber Stone with a toggle switch
Cons: Costs mana, just -1/-0, mass -1/-0
Note: I remember when you needed side material to understand flavour text. Those were the days. *shakes walking stick at young children on the lawn*