Malduk, as this is a card game, no matter how you look at it luck will always be a factor.
You can improve your chances to win, but in the end, all you can rely on are statistics, and improve your chances in that manner.
If I read 2 more comments telling me to raise cost or that it is OP I will instead reduce the chance to miss to 25% for both. This may balance it a bit more.
And as for the confusion as to why it removes one random quanta, it is due to the logic that to escape from a very complicated labyrinth you may need more than 1 day, and thus resources such as food. I obviously have paralleled the quanta we gain as energy to food and resources and instead of adding more turns, assume that for a creature to escape a Labyrinth it will need more resources.
I have been pondering however, maybe I could leave/increase the 30% and make it remove more quanta only if it affects non-flying creatures. Flying creatures could just fly out right?