Ransack 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

Look at the top five cards of target player's library. Put any number of them on the bottom of that library in any order and the rest on top of the library in any order.

How it works : Ransack

Original English text — Wizards of the Coast / Scryfall

No additional ruling has been published for this card.

Interactions with other cards

These cards' text mentions Ransack.

Afflicted Deserter // Werewolf Ransacker

At the beginning of each upkeep, if no spells were cast last turn, transform this creature. Whenever this creature transforms into Werewolf Ransacker, you may destroy target artifact. If that artifact is put into a graveyard this way, this creature deals 3 damage to that artifact's controller. At the beginning of each upkeep, if a player cast two or more spells last turn, transform this creature.