Jalira's Show 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

Whenever you attack, create a 1/1 red Performer creature token with flying. Whenever you planeswalk here or chaos ensues, destroy up to one target creature. When you do, its controller reveals cards from the top of their library until they reveal a creature card. The player puts that card onto the battlefield, then puts the rest on the bottom of their library in a random order.