The idiom "card up sleeve" refers to a secret plan or strategy that is hidden from others, often used to deceive or mislead someone. The phrase comes from the traditional sleight-of-hand trick of hiding a card up one's sleeve, which makes it difficult for others to see what you are doing.

The idiom "all roads lead to Rome" means that no matter what path you take, you will eventually end up at the same destination. It can also mean that any outcome or result will inevitably lead to a desired or planned end.

The idiom "take aback" means to be surprised, shocked or taken aback by something unexpected or unpleasant that one has experienced.

The idiom "scared to death" is a figurative expression that means being extremely frightened or terrified. It's commonly used when someone is so scared that it appears as if their fear could lead to death.

The idiom "ring a bell" means to remind someone of something or to call attention to an event, typically by making a sound like a bell ringing. It can also mean to be impressed or affected by something, or to signal the end of something.