Red Holy Ring
"No damage from small rocks"
The Red Holy 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 Nut. He can also acquire it in a Seed Ring form by bumping into Maple. The ring can also be obtained through a Fortune Link at Vasu's jewelry store.
When equipped, the Red Holy Ring causes Link to be immune damage caused by small rocks, such as those that are spit out from Octoroks. Considering that there aren't too many enemies that attack with such rocks, this ring is not a very effective ring. Link can use his basic Shield instead of this rather useless ring. Other defensive rings are more effective, such as the Red Ring or the Armor Ring L-1. If you have the L-2 Ring Box or the L-3 Ring Box, you can keep the Red Holy Ring stored, but it is unwise to have it equipped unless you are on a screen with enemies that shoot rocks at you.
The Blue Holy Ring is very similar magical ring. Instead of making Link immune from small rocks, Link is immune from Fireballs that are shot out from River Zora enemies.