Start the battle with your flask wheel on slot 3.
This can be bought at the Merchant which is counted as a Tier 2 item (400-300 gold based on Commerce), and also gained from melees.
Recipe
Material 1 | Material 2 | Ore | Gold | Level | Method of obtaining | Accidental Creation |
Gourd | Crafting Sphere | 1 | 50 | 1 | Cultivate Level 2 | |
Gourd+1 | Crafting Sphere | 1 | 50 | 1 | Cultivate Level 2 |