Assuming that you’re already done with the main game and unlocked the Hero Mode, then you can now participate in the mini games that The Thunder Dragon has to offer.
In the Lightning Round, the Thunder Dragon offers two types of mini games; the Silent Realm mode, where your objective is to clear an area you just cleared under a specific amount of time, and the Boss Rush mode, where you’ll get a chance to take down the twelve bosses of the game once again and claim your rewards in the end.
When doing the Silent Realm mode, beat any of the four realms under the required time and you’ll earn rupees or rare treasures:
– Faron Woods (must complete it at 3:00 minutes)
– Eldin Volcano (must complete it at 6:00 minutes)
– Skyloft (must complete it at 4:00 minutes)
– Lanaryu Desert (must complete it at 4:15 minutes)
As for the Boss Rush, every boss you defeat will earn you the following rewards:
1 – 20 Rupees
2 – Small Treasure
3 – 100 Rupees
4 – Pieces of Heart (or 200 Rupees after you got this
5 – 300 Rupees
6 – Rare Treasure
7 – 500 Rupees
8 – Hylian Shield (if you have this, you’ll get 1000 Rupees instead)
9 – 2,000 Rupees
10 – 3 Rare Treasures
11 – 3,000 Rupees
12 – 9,900 Rupees