Great Fairy of Kindness
If you gathered all 15 Stray Fairies then head to the house on the eastern end of Ikana Canyon. Inside you’ll restore the Great Fairy of Kindness who will gift the Great Fairy Sword . You have to put this in an item slot, but it deals four times normal damage!
Piece of Heart #45
To enter the Secret Shrine you’ll need at least 16 Heart Containers. Head to Ikana Canyon and swim upstream past the Blue Octoroks.
In this hidden cave you’ll find a Sun Crest above a door, shoot it with a Light Arrow and head inside to meet the Poe Collector once again.
Your objective is simple, head to each of the four rooms and defeat the Mini-Bosses. After each Mini-Boss a chest will spawn with a Silver Rupee inside.
The first room is a few Dinofols, the Great Fairy Sword will defeat them in one hit. The Wizrobe is back in the next room and should provide no challenge.
Wart makes a reappearance and requires a safe strategy to remove the bubbles. Lastly, you’ll find the Garo Master once more, remember to strafe then counter and immediately defend.
Once all rooms are cleared you can speak with the Poe Collector to receive your Piece of Heart .