Expand stats system with progression (mostly for Arena mode to make it more useful), such as periodically increasing stats as game progresses, certain abilities unlock, which are locked at the start, new abilities gained.

Expected results:

• Stats increasing
• Locking certain abilities at the start (visible as greyed out) that are randomly unlocked
• Additional abilities unlocking that are not visible from start

Expected time to complete: 6 hours (per assignee)