It... has a counter...
Though it is small and in the corner, so it's fair that you missed it.
I thought the timer only shows how long until it begins. Does it also show how long until it runs out?
I misinterpreted your original question. The levitation always lasts 5 seconds.
how did you count that ?
The timer sets itself back to the large number once the levitation starts, not when it ends.
