black panther 166 card in shop, take or leave?
Depends on how much. If it's low-rank, I'd grab it for the +3% crit damage from the associated card collection. If it's high-rank and costing a ton of crystals, I'd probably pass.
Depends on your cards. Maybe it’ll help you but IMO the only cards worth buying are the Ultimate Endgame cards like Uncanny Avengers