Trick Tower is the site of the third phase of the 287th Hunter Exam.
Plot
Hunter Exam arc
One of the beasts living outside the tower attacks an examinee
It is a top security prison built in an enormous spire erected atop a plateau, filled with traps and surrounded with dangerous beasts.[1] Atop the zenith of the tower are several hidden trapdoors that serve as entrances to numerous paths.[2] Exam candidates were given 72 hours to reach the bottom of the tower; it's used as a prison by Lippo as well.[1]
References