Worldwalker Helm
Artifact
Oracle Text
If you would create one or more artifact tokens, instead create those tokens plus an additional Map token. (It's an artifact with "
, 
, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")
, : Create a token that's a copy of target artifact token you control.
Rules for this card
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A keyword action that causes a player to reveal the top card of their library and then to take different actions depending on whether a land card is revealed this way. See rule 701.44, “Explore.”
Rulings (7)
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Wizards of the CoastWorldwaker Helm's first ability applies to all kinds of artifact tokens that its controller creates, not just Map tokens.
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Wizards of the CoastIf the copied token has
in its mana cost, X is 0. (Most tokens don't have a mana cost unless they're copying something else.)
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Wizards of the CoastThe additional Map token won't have any abilities the other tokens were created with. Anything else specified in the effect creating the token (such as tapped or "Exile that token at end of combat") applies to both the original tokens and the Map.
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Wizards of the CoastYou don't need to control the spell or ability that creates the tokens, but you do have to be the one creating the tokens for Worldwaker Helm's first ability to apply.
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Wizards of the CoastIf the copied token is copying something else, then the new token enters the battlefield as whatever that token copied.
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Wizards of the CoastAny enters-the-battlefield abilities of the copied token will trigger when the token enters the battlefield. Any "as [this permanent] enters the battlefield" or "[this permanent] enters the battlefield with" abilities of the copied token will also work.
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Wizards of the CoastThe new token created by Worldwaker Helm's last ability copies the original characteristics of the target token as stated by the effect that created the target token and nothing else (unless that token is copying something else; see below). It doesn't copy whether the target token is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.