Heart Ring L-1
"Slowly recover lost Hearts"
In order to acquire this magical ring, Link must complete the Temple Secret. During a Linked game of Oracle of Ages, a Great Fairy appears over the crumbled remains of Wing Dungeon in the Present. The Fairy will tell you the Temple Secret, asking you to tell it to the Great Fairy that is behind the falls in Holodrum's sunken Temple of Seasons.
Return to the Temple of Seasons in Oracle of Seasons and walk straight northward in the main chamber. Walk through the waterfall and speak with the Great Fairy at the end of the path. Tell her the secret that you learned from Oracle of Ages and she will reward you with a Seed Ring, which becomes the Heart Ring L-1 when appraised.
A more powerful variation of this ring can be acquired in the form of Heart Ring L-2. This ring recovers hearts twice as fast as Heart Ring L-1.