Ok, hear me out.
A deckbuilding game. You have 4 resources: lifes, coins, diamonds and points.
You also have a hand of cards. You can play a card for its effect for free. You can also summon the card by paying its cost, which makes the card leave your deck, but it will do its effect automatically every turn or so.
There will be progressively stronger monsters getting into your deck with effect that remove your life. You can defeat those with an effect of a card, or banish them for a cost of coins and diamonds, earning you points.
You can get new cards into your deck by paying coins.
I can see myself putting a prototype together in 3 hours or so, then will see whether it is worth pursuing.
