stoic bridge
It would be cool to see some new slay the spire themed tarot cards because of the games card based gameplay along with as well as some themed clothing for the tailor based on the characters such as the silents green robe and skull. If they wanted to make this even cooler they could have neow(the whale) making an appearance with clauneck since they’re both card related I guess.
An example of a card could be one to summon a demon like electric orb based on the defects orb system
This is also a fitting crossover because of them both being rogue likes/lites with cards and would be a good match with the dont starve crossover as that was fitting with the survival aspects of cotl
This is just my neat little thoughts and I have no idea if any of this would work or be cool