Weapon details
Cool Steel
Type: Sword
Rarity: ★★★ Base ATK: 39 ATK%: 7.7%
A reliable steel-forged weapon that serves as a testament to the great adventures of its old master.
Passive effect
Bane of Water and Ice
R1
Increases DMG against opponents affected by Hydro or Cryo by 12%.
R2
Increases DMG against opponents affected by Hydro or Cryo by 15%.
R3
Increases DMG against opponents affected by Hydro or Cryo by 18%.
R4
Increases DMG against opponents affected by Hydro or Cryo by 21%.
R5
Increases DMG against opponents affected by Hydro or Cryo by 24%.
Cost per phase
Phase 0
Level cap: 20
Adventure rank required: -
Mora: -
Materials
-
Phase 1
Level cap: 40
Adventure rank required: 15
Mora: 5,000
Materials
Firm Arrowhead x1 
Heavy Horn x2 
Tile of Decarabian's Tower x2 Phase 2
Level cap: 50
Adventure rank required: 25
Mora: 10,000
Materials
Firm Arrowhead x5 Heavy Horn x8 
Debris of Decarabian's City x2 Phase 3
Level cap: 60
Adventure rank required: 30
Mora: 15,000
Materials
Sharp Arrowhead x4 
Black Bronze Horn x4 Debris of Decarabian's City x4 Phase 4
Level cap: 70
Adventure rank required: 35
Mora: 20,000
Materials
Sharp Arrowhead x6 Black Bronze Horn x8 
Fragment of Decarabian's Epic x2 Phase 5
Level cap: 80
Adventure rank required: 40
Mora: 25,000
Materials
Weathered Arrowhead x4 
Black Crystal Horn x6 Fragment of Decarabian's Epic x4 Phase 6
Level cap: 90
Adventure rank required: 50
Mora: 30,000
Materials
Weathered Arrowhead x8 Black Crystal Horn x12 
Scattered Piece of Decarabian's Dream x3