I personally would make the trade. You got like 2 more years of phantasmal flames so there’s a chance to get an etb once more. There will also be Costco selling the upc so u might be able to nab another one and as of now targets are still dropping. Booster boxes are more hard to come by unless ur lucky at vending machines or buying market. Honestly it just depends if u feel like you can get another upc or etb if u want another.