emperor put in a very wrong place, since the chess game maker aims to know "the value of mortals" via tav.
the chess game maker won't maneuver your trump card -- the prism, via a playing tricks creature to the final.

emperor is a master of manipulation. he will reveals his true color, if tav doesn't follow his words. emperor does want tav to be his puppet, just he can not do because tav shares the protection of the prism.

if the screenwriter insists the plot of emperor, this will be still ok.

but, players should be able to control the prism in early stage...at least in act 2 somepoint. this means that tav should gain the chance to counterattact emperor in mid game. the screenwriter leaves emperor to the last and forces tav to do the wrong major decision, this makes the act 3 much discount the score of the game 90/100 => 75/100

even, i think the screenwriter sets players a trap intentionally.

besides, i think the original dream lover, the tadpole -- daicy will be a much better setting.