Unfortunately, while there is slightly more supply for worse condition copies, theyre not exactly cheap either
But Lukka isn't one of those Planeswalkers who lives and dies by the ult, and I love that
Blot Out Kill your darlings This is a three-mana Black instant card thats incredibly good at dealing with the most expensive threat on the board, or at least the most expensive threat that you dont control
While I wouldnt claim that hes the best deck out there, he has been a pretty effective commander in a shell including Rule of Law effects and other relevant stax pieces and hatebears
Just be aware that you want a cheap commander to go alongside it because backgrounds don't work on their own
Ultimately, Fynn, the Fangbearer is far from the best choice for a Infect-themed Commander MTG deck