First of all, keep him out of the light, he hates bright light, especially sunlight, it'll kill him. Second, don't give him any water, not even to drink. But the most important rule, the rule you can never forget, no matter how much he cries, no matter how much he begs, never feed him after midnight.
When I first saw this thing I thought it was an adorable floof so I walked up to it, I knew they needed element so I gave it some. It transformed. For some odd reason I still thought it looked cute. So I hugged it. You can guess what happened next.