It’s time to visit Headstone Island (C7), which Red marked on your Sea Chart. Warp to Outset Island (B7) and head east to shorten your trip.
Now you’ll see why you needed the Power Bracelets: Headstone Island gets its name from the giant stone head that blocks the entrance to a cavern. Lift it out of the way and enter the cavern.
At the end of the cavern, a giant stone tablet blocks the entrance to the Earth Temple. Along the bottom of the tablet are six Wind Waker notes. Use the Wind Waker to learn your first 6/4 tempo song, the “Earth God’s Lyric” (hold 
for 6/4 tempo and play 
, 
, 
, 
, 
, 
).
The ghostly image of a Zora appears before Link. This is Laruto, the former sage of the Earth Temple. Ganon attacked her temple and stole her soul to weaken the Master Sword. Link needs to find another earth sage and bring them to the Earth Temple, clearing the temple of monsters as he does. Link will know the sage by the harp they carry, and playing the “Earth God’s Lyric” will show them their new duty. Only the new sage can remove the stone tablet that blocks the Earth Temple entrance.