I'd like to have a combine mechanics in a roguelite deck builder where you replace your cards either permanently or depending on the rules for replacement/merging for the card mechanics.
Downside - got stuck on the second level with no cards.
So at the beginning of every combat your deck resets the combinations, so you can recombine the cards you've got in different ways... Though it looks like that bug is preventing people from seeing that :(...
We were going for a roguelike deck builder concept, but building the deckbuilder part took so much time, so we could only do a small part of the roguelike part >_<...