Terraformer 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
: Choose a basic land type. Each land you control becomes that type until end of turn.
Complete guide
Terraformer is a versatile Human Wizard that allows you to reshape your mana base on the fly. By spending just one generic mana, you can transform the identity of your entire landscape to suit your immediate needs. This guide will walk you through the nuances of land type transformation and how to master this blue utility creature.
Universal Terraforming
When you activate Terraformer's ability, you choose one of the five basic land types: Plains, Island, Swamp, Mountain, or Forest. Every land you control, regardless of its original name or abilities, becomes that specific type until the end of the turn. This is an all-or-nothing effect for your side of the battlefield.
What Changes (and What Doesn't)
Your lands will gain the mana ability associated with the chosen basic land type. For example, if you choose Forest, all your lands can tap for green mana. However, this effect overwrites all other innate abilities of those lands. Crucially, changing a land's type does not change its name, its supertypes like 'Basic' or 'Legendary', or its permanent type.
Timing and Strategy
Terraformer's ability is an activated ability that can be used at instant speed. This makes it excellent for fixing mana mid-turn or preparing for a specific spell. Keep in mind that once the ability resolves, all lands you currently control are affected; lands that enter the battlefield after the ability has resolved will retain their normal types.
Interaction examples
Solemn SimulacrumYou cast Solemn Simulacrum and use its ability to put a Basic Mountain onto the battlefield tapped. If you need blue mana instead, you can pay one mana to activate Terraformer and choose Island. Now, both your original lands and the newly placed Mountain are Islands, allowing you to cast blue spells even if you previously lacked the sources.
Roaming ThroneSuppose you have many utility lands that only produce colorless mana, but you want to cast Roaming Throne which requires four generic mana. If you have an effect that triggers when a Wizard enters (like a hypothetical triggered ability), you can use Terraformer to turn all those utility lands into Islands. While Roaming Throne is on the stack, ensure your mana is correct, then as it enters, choose 'Wizard' to double Terraformer's hypothetical triggers.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Terraformer
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Terraformer’s effect overwrites the land type of all lands you control that had other types and gives a land type to all lands you control that don’t normally have one.
No other card is named in this ruling.
- #2· Wizards of the Coast
Changing a land’s type doesn’t change its name or whether it’s legendary or basic.
No other card is named in this ruling.
- #3· Wizards of the Coast
Lands you control will have the mana ability of the basic land type you choose (for example, Forests can tap to produce green mana) and will lose all other innate abilities they had.
No other card is named in this ruling.
Legal formats
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Meta decks with Terraformer
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