Is there an energy mechanic or stamina? Andy Smith September 01, 2017 21:08 Updated Yes, Sands of Time is required to battle and is passively generated every 5 minutes. You can also receive Sands of Time after battle. Additionally, Sands of War are used to battle in the Arena and are passively generated every hour. Related articles What are Trooper Badges used for? Comments 0 comments Article is closed for comments.