Swine Rebellion 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

If you control three or more Boars with different names, conjure each card from the Three Pigs spellbook onto the battlefield. If you control two or fewer Boars with different names, conjure two cards of your choice from the Three Pigs spellbook into your hand, then put one of them onto the battlefield.