The Blessed Elixir

The Blessed Elixir is a quest in Legend of Mana.

Premise
Nuns in Gato Grottoes claim that a strange rabbit came and drank all their Blessed Elixir from their barrels, making most of their rituals unperformable. They need water from the oasis to make new elixir, so the protagonist head to Geo's bartender to ask him for guidance. While exiting the cave, he/she stumbles on a drunken Niccolo mistaking him for a monster. The main character is forced to attack his friend to continue to his/her next destination. Back in Geo, the bartenter discloses that he was taught by his mentor in Lumina, and that he was able to get a barrel in his soul thanks to him. His mentor is found near the "Mischevious Spirit" Tavern, and shares the story about elixir making tradition in Lumina. Fermenting in barrels, the amount of liquid slowly goes down over time, due to the population taking little sips here and then, believing that the spirits can't wait for the elixir to be ready. That is where the local tavern gets its name. The protagonist gets a barrel in his soul for answering correctly to his question and heads to Duma Desert in search of the oasis. As he/she approaches the water source, a barrel miraculously materializes from his/her soul, filling itself with oasis water. The filled barrel is then given to the Nuns in Gato Caves who are ecstatic about the delivery.

Solution
Enter Geo.

Go to the Bar area and talk to the bartender. Exit out to the World Map.

Enter Gato Grottoes and go to the Waterfall in the western section of the map. Exit and re-enter to go to the Dungeons (Caves) from the western side.

Go right and enter the cave door to the right of the tree monster. Continue through the dungeons until you find a room with a bunch of barrels and some nuns. Talk to the nuns to trigger the event and leave the room.

Now you get a chance to beat the snot out of Niccolo. Wee Hoo!

Enter Geo and talk to the bartender again.

Enter Lumina and talk to the bartender in the western section.

Enter the Duma Desert and work your way through the areas until you find the spring.

Watch the barrel fill up with water and you are done with this Event.