/jp/ - Otaku Culture

So here's a little cute mystery I think that will move your little grey cells a bit and you might even learn something new in the process! There's a bit of fluff in this, so please bear with me.

Battler decided that he wanted to show Maria a magic trick, so he had everything prepared before coming to the island. On the island while the cousins were talking among themselves battler brought up the idea that he knows how to turn water in to magic water. Naturally maria wanted to see Battlers magic, so battler gave a nod to Shannon and Shanon left the room.
After a few minutes Shanon returned.
"Now, Maria, let me show you my magic water. Shannon, could I have that glass of water please?"
Shannon slowly passed it to Battler.
"Now maria, as you can see this normal water right?" Battler showed the glass to maria, and even sloshed it around for a bit "It moves fairly normally, so you know that there's nothing wrong with it right?"
Maria nodded enthusiastically.
Battler set it down on the table and put his hand over the glass closing his eyes. And after a few seconds the liquid turned dark blue instantly.
Needless to say, that maria was overjoyed and did not stop talking about it for the rest of the day.

Now my friends, how did Battler do it?