World Shaper 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 this creature attacks, you may mill three cards. When this creature dies, return all land cards from your graveyard to the battlefield tapped.

Complete guide

World Shaper is a powerful Merfolk Shaman that rewards you for filling your graveyard and thrives on its own demise. It serves as a bridge between self-mill strategies and massive mana ramp by returning every land you have lost back to the battlefield.

Filling the Graveyard

The first ability of World Shaper is an attack trigger. Whenever it is declared as an attacker, you have the option to mill three cards. This is a 'may' ability, meaning you can choose not to mill if your library is low or you already have the cards you need in your graveyard.

The Grand Resurrection

The second ability triggers when World Shaper dies. When it moves from the battlefield to the graveyard, every single land card currently in your graveyard is returned to the battlefield. These lands enter the battlefield tapped, regardless of their own printed abilities or how they ended up in the graveyard.

Timing and Strategy

Because the land-return ability is a death trigger, World Shaper is a prime candidate for sacrifice effects. You don't have to wait for combat to get your lands back; if you can destroy or sacrifice it, you can trigger the ramp immediately. Remember that the lands enter tapped, so you usually won't be able to use that mana until your next turn unless you have ways to untap them.

Common Mistakes

A common error is forgetting that World Shaper must actually hit the graveyard for the second ability to work. If it is exiled instead of dying, the ability will not trigger. Additionally, the mill ability only triggers when World Shaper is declared as an attacker; it does not trigger if the creature is put onto the battlefield already attacking.

Interaction examples

Maximizing Value with Witnesses

Eternal Witness

If World Shaper dies and returns multiple lands to the battlefield, you might have already milled an Eternal Witness. If you then use a separate spell to return Eternal Witness to the battlefield, she can target World Shaper in your graveyard to bring it back to your hand, allowing you to repeat the entire process.

Sequential Ramping

Solemn Simulacrum

When Solemn Simulacrum enters, you search for a basic land. Later, if both creatures die—perhaps to a board wipe—you will draw a card from the Golem and return every land card in your graveyard to the battlefield with World Shaper, including any lands you milled during previous attacks.

Guide written with AI from the official text and rulings. Official English text prevails.