What are the specific rules and mechanics for combat and creature interactions in Magic: The Gathering, particularly in regards to the keyword "fight"?

In Magic: The Gathering, combat involves creatures attacking and blocking each other. When a creature with the keyWord "fight" is involved in combat, it means that it deals damage equal to its power to another creature, and that creature deals damage equal to its power back. This interaction can result in both creatures being destroyed if their power is high enough.