"Become a Moblin"
The Moblin Ring is a Magical Ring that Link can obtain in Oracle of Seasons and Oracle of Ages. Link can acquire the ring by planting a Gasha Seed and finding it within a Gasha Tree. He can also acquire it in a Seed Ring gained by bumping into Maple.
In Oracle of Seasons, the Moblin Ring can be found in a cave one screen east of Snake's Remains. In order to reach this cave, the season must be changed to Autumn so that Link can pick up the Mushrooms that block the path. There is a Tree Stump on this screen, but it can only be accessed by first traveling through the Snake's Remains Dungeon.
From the entrance of Snake's Remains, head up two screens, right two screens, and down a screen. Exit the dungeon through the staircase at the southeast corner of the room. Use the Power Bracelet to lift the rocks and then change the season to Autumn. Drop down below, cut through the Mushrooms, and enter the cave on the right.
You will need to use the Magnetic Gloves in order to reach the other side of the gap. Do so and open the treasure chest to get a Seed Ring, which becomes the Moblin Ring when appraised.
When Link wears the Moblin Ring, he will transform his physical appearance into that of a Moblin. While in Moblin form, Link will be unable to use any weapons. Using the ring has very little practical use at all and it's just another ring for collection purposes. While in Moblin form almost all the regular characters in the world will not communicate with Link. Strangely, if Link enters certain shops, even if the ring is equipped, he will automatically transform back into standard form.
Strangely, when the Moblin Ring is worn by Link, he becomes immune to getting sucked in by Like Like enemies.