Blood Moon Mechanics

Gloom permanently reduces your max hearts (shown as dark, cracked hearts) until cured. Cook Sundelions (found on Sky Islands) into Sunny meals to restore gloom-damaged hearts. Returning to the surface also slowly restores gloom damage if you stand in sunlight. Stock up on Sundelions before entering the Depths.

Cold regions (Hebra, Mount Lanayru) require Cold Resistance — wear the Snowquill Set or cook Spicy Peppers into meals. Hot regions (Gerudo Desert daytime, Death Mountain) require Heat Resistance or Flame Guard. The Flamebreaker Set from Goron City provides Flame Guard. Two levels of resistance are needed for extreme zones.

During thunderstorms, metal equipment attracts lightning. If you see sparks on Link, immediately unequip all metal weapons, bows, and shields. Wooden and bone equipment is safe. The Rubber Armor set (found in Shrine quests) grants Lightning Proof when fully upgraded, making storms harmless.

Before entering the Depths: bring 50+ Brightbloom Seeds (Giant if possible), 5+ Sunny meals (cook Sundelions), at least 10 arrows, a Gloom-resistant weapon or shield, and enough food. Wear the Miner Set for visibility or Depths Armor for Gloom resistance. Light every Lightroot you find — they serve as fast travel points and illuminate huge areas.