Needing that many copies does add up, but each one is only a base Rare, which makes it the cheapest staple per card in the entire set
It tells a story of a modern market where cards are immediately sleeved, toploaded, and submitted to grading services, often without ever being played with, shuffled, or even fully handled outside of their protective packaging
Theres nothing wrong with it, but always purchase code cards from trusted sellers
Swords doesnt need any synergy or support
With Tainted Indulgence, we can choose to discard a card with a different mana value than the ones we have already, and with Aven Heartstabber, we will get to mill two cards, making it more likely for a future Aven Heartstabber to have that +2/+2
This can also help draw out early removal from our opponents hand that we'd rather them use on an Exemplar instead of one of our crewed Vehicles later