Ment
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Before the battle, Garret gathers all the life potions from those who have them and equips something else instead of the mermaid. This is a guaranteed step 1. Garret, Ayko, and Merel eat emeralds before the battle, just in case. In the battle, Kilik definitely uses Firestorm, then Sapphire for HP, then Firestorm until victory. The guys on the walls next to us are taken out by the Cat and Garret.