Falko, Showoff Pilot 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

As long as a Spacecraft or Vehicle you control dealt combat damage to an opponent this turn, cards in your hand have spectacle. Their spectacle cost is equal to their mana cost minus . (You may cast a spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Whenever you cast a spell for its spectacle cost, put a +1/+1 counter on Falko.