User blog comment:Martialmaniac/Chrollo, that chatterbox/@comment-17259909-20160509205629/@comment-5780397-20160511114405

Didn't he create the bookmark after his fight with the Zoldycks, in order to defeat Hisoka? I seem to recall he implied it was so, I'll check. Anyway, it is indeed a possibility that the bookmark forces him to reveal th econditions of all abilities he uses through his book, not only the ones he activates with the bookmark.

Genthru described also the conditions and Limitations of his abilities, for example that his human bombs could free themselves by touching him and saying the key words, that he needed to explain his ability for it to be activated, and also eplained an entrely different ability, Little Flower.