Oh yeah that may be right, looked at Question which didn't say that, but that is an old card, I should know better heh.
Fireworks! They can be quite dangerous if you are not careful, and it being during the End Phase, as in the end of your turn, the end of the year, it made sorta sense. I was more so working from the effect perspective first, rather than a theme, but the card came together with a semi-theme to it i thought.