Battle for Baldur's Gate boxes are pretty cheap online thanks to the sets relative commercial failure
Each Commander deck features an Imagine: Courageous Critters planeswalker card in traditional foil, with the non-foil version available in Collector Boosters
A thread where you describe your design strategy and goals, providing useful information and a guide on how to view the set, along with a link to an external card database, would be much easier on your users and far and away more helpful in soliciting worthwhile feedback
This list replaces Sebastian with Ursula, Vanessa as its two-cost, Singer 4
Pioneer Coming To Arena Soon
Finally, be sure to regularly update the spreadsheet with new cards and changes in value to ensure that it remains accurate and up-to-date