whenever a detective enters the battlefield under your control and whenever a detective you control is turned face up, put a +1/+1 counter on it.
to solve — you control three or more detectives. (if unsolved, solve at the beginning of your end step.)
solved — if one or more tokens would be created under your control, those tokens plus a clue token are created instead. (it's an artifact with "2, sacrifice this artifact: draw a card.")