What are the eight-character idioms about stories?

Like the Eight Immortals crossing the ocean, each shows his magical powers-proving his value by his own resources; Faced with the same difficulties, everyone gave full play to their talents.

An old pioneer lost his horse-a blessing in disguise.

Nothing ventured, nothing gained-nothing ventured, nothing gained; If you want to find pearls, you must dive underwater.

The two sides disagreed and fought like kilkenny cats, which made the third party take advantage.

I only know stories, but I really can't find too many.

The landlord can buy a copy of China Knowledge Collection, which is quite useful.