It costed only 1 coin or gem which is because is useless.
It's a wooden box labeled "Coming Soon" with an eye as an "o" letter.
It not have any powers, it just a box. When you play it, you can only move its head left or right facing down. And when sinks down to the bottom, it will stay without doing anything. They were used for april fools day by FGOL and later the Box got replaced with the new Pyro Shark.
- You could only play as the box for up to 45 seconds per session when it was in the game as you weren’t able to eat any prey with it.