Benalish Knight is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flash (You may cast this spell any time you could cast an instant.) First strike (This creature deals combat damage before creatures without first strike.)

How it works : Benalish Knight

Original English text — Wizards of the Coast / Scryfall

No additional ruling has been published for this card.

Interactions with other cards

These cards' text mentions Benalish Knight.

Benalish Knight-Counselor

Enlist Whenever Benalish Knight-Counselor enlists a creature, you get a one-time boon with "When you cast a creature spell, that creature enters with a +1/+1 counter on it."