Dive!

Dive! is a card game for 1 to 2 players. Your goal is to deploy a team of divers, earn gold to improve their equipment, and ultimately recover more priceless treasure than your opponent.

You start with a simple 10 card deck and over the course of the game you can:

 Purchase Equipment cards to add to your deck and improve the effectiveness of your dive crew.
 Freedive cards for a risky boost to diving capability at the cost of permanently losing them.
 Acquire Treasure to gain immediate bonuses and ultimately decide the winner in this all out race to riches.

—description from the designer