Upgrade Chain Charm through three ranks and it tops out at Burst Lv3. The first rank costs 3,000z to craft, every rank after that is an upgrade. Some of the materials only come from Congalala, Guardian Ebony Odogaron, Nerscylla and three more monsters.
Rank by rank
Chain Charm IRarity 5
Burst Lv1: On first hit, gain a small temporary attack and element boost, replaced by a larger boost after the fifth hit.
Craftable · 3,000zChain Charm IIRarity 7
Burst Lv2: Hit 5 successive times for a moderate stat boost.
Upgrade from previous rank · 9,000zChain Charm IIIRarity 8
Burst Lv3: Hit 5 successive times for a bigger stat boost.
Upgrade from previous rank · 16,000z