Poison

Alex ran towards the little girl, and pinched her cute rosy cheeks. "Didn't I promise that I'll go back? Ezekiel, this is..." Alex stopped pinching the little girl's cheeks as she actually forgot to ask for her name.

"Lili!" The little girl showed a beaming smile saying her name. 

"Lili!! And Lili, this is Ezekiel. She sells a lot of different kinds of potions. What do you think we need right now??" Alex asked Ezekiel since he is better at these kinds of things than her.

"Hmmm, what do you have there?" When he thinks about it, they really don't need potions this early in the game. With him being the healer, they can save a lot of money from healing potions. 

"We have healing potions, mana potions, poison potions..." Lili showed all of her stocks 

If Alex let him decide where to use their money. Then he will use it to buy a new armor with better quality. After all, his armor broke in the duel.