Onyx Crystal Skull
Sanji & Franky
A crystal skull that shines an onyx color. Extremely precious and hard to find. While still shrouded in mystery, it is said that "Sanji & Franky" will unlock a time-transcending super evolution if they equip this.
How to get
Sanji & Franky
Treasure Map · Calm Sea · 2025-06-18 – 2025-06-22
Treasure Map shop
Shop · 
×4,000 · Unlimited
Evolves
Spent to evolve 1 character: Sanji & Franky.
