- Used for Evolve ships. Each shipper will have 3 Evolve levels corresponding to different amounts of stones.
- There are 10 types of stones in the order of 1 -> 10 corresponding to 10 basic types of ships. Subsequent ship merges will use stones based on base ships.
- Playing all modes (Except Clan Boss, Boss world, Tournament, Endless) have a chance to drop 1 Stone. Type Stone is based on ship players used in that mode