Upgrade Survival Charm through three ranks and it tops out at Survival Expert Lv3. The first rank costs 500z to craft, every rank after that is an upgrade. Some of the materials only come from Blangonga and Lala Barina.
Rank by rank
Survival Charm IRarity 3
Survival Expert Lv1: Restores 50 health.
Craftable · 500zSurvival Charm IIRarity 5
Survival Expert Lv2: Restores 80 health.
Upgrade from previous rank · 3,000zSurvival Charm IIIRarity 6
Survival Expert Lv3: Restores 100 health.
Upgrade from previous rank · 6,000z