(This also goes under modern au sort of. A lot of these chapters do actually)
1 day Emo and his dad were going on a vacation to a deserted island they recently bought. Emo brought Matrix, and (Oc) along on the trip. When they got to the island Emo and Co went exploring around the island before finding a cave that had a weird pool in the center. The three agreed to come back after dark. They did as they agreed and took a quick swim in the pool before the full moon appeared overhead. They left after a crazy phenomenon of sparkles and bubbles surrounded them. The next day they went home and went about their normal routines. Matrix was in the bath when he grew a fish tail. Emo was walking around when the sprinklers started and grew a fish tail. (Oc) (insert the activity that got them splashed by water here) and grew a fish tail. And the three of them got some magic powers along with the tails. Matrix can control air. Emo can heat liquids up. (Oc) can (insert power which relates to their Vision in the normal universe here). But how and why? Oh and 1 more thing after touching water the three have 10 seconds to dry off before they transform.
