It is impossible to fly indefinitely. The blue cat trick consumes magic according to the percentage of the upper limit of the magic value, and it is very high. So even if the more magic you have, the faster you return to magic, there will still be times when you consume magic.

The value of the blue cat lies in the speed of returning to the demon. If used well, it is basically a nightmare opposite, which is too NB.

So I am proud that Blue Cat has knowledge.