
In the original Agnes, this card should be considered nothing more than a skill card. A skill card that you can potentially recur with Scavenging.
In parallel Agnes, things are a bit different. The upgraded version of this card is much better for parallel Agnes, but this original version of the Heirloom still has it's uses.
But overall, as identified by reviewers 7 years before me, this remains one of the worst signature cards. Which is particularly brutal when you consider that Agnes also has one of the worst weaknesses in the game too!