Maestros Confluence 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

Choose three. You may choose the same mode more than once. • Return target monocolored instant or sorcery card from your graveyard to your hand. • Target creature gets -3/-3 until end of turn. • Goad each creature target player controls. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)