My kids were given this game as a Christmas present this year. I played Cluedo for years as a kid myself, but it did not include the Power Cards feature of this edition. The instructions have the following to say on these cards:
You will see that some spaces on the board have question marks on them. If you land on a question mark you must take a Power Card from the pile and read it out. There are seven Kinds of Power Cards, and some will help you but some will hinder you. You must use the card on the turn you collect it, unless it specifies otherwise.
That all seems fine until you actually read some of the cards. Example card:
A towering pyramid of chocolate balls distracts you. You cannot make any suggestions this turn.
Given that you can only make suggestions while in a room, and the fact that all question marks on the board are on squares between rooms, if you must land on a question mark to take a Power Card, how could you make a suggestion on 'this turn' anyway (since you are not in a room)?
To try to make sense of it, we re-interpreted the phrase 'If you land on a question mark' to 'If you pass over a question mark'. The kids decided this was a great opportunity to pass as many power cards as possible, rather than make their way to actual rooms though, and sometimes they ended up with 3 power cards in a single turn! It got ridiculous.
Ultimately, I think we will have to augment the rules to limit players to one Power Card per turn, but if somebody knows the true intent behind the use of these cards, I would love to hear it!