Prismatic Geoscope 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
This artifact enters tapped. Domain —: Add X mana in any combination of colors, where X is the number of basic land types among lands you control.
Complete guide
Prismatic Geoscope is a powerful artifact that serves as a cornerstone for decks utilizing multiple colors. By tapping into the Domain mechanic, it rewards you for diversifying your land base with a massive burst of mana. This guide will help you understand how to maximize its potential in your next game.
What It Does
Prismatic Geoscope is a five-mana artifact that enters the battlefield tapped. Its primary function is a mana ability that scales with the number of basic land types among lands you control. These types are Plains, Island, Swamp, Mountain, and Forest. Note that you are counting the types themselves, not the number of lands. Even if a land is nonbasic, if it has one of these subtypes, it contributes to your total.
How It Resolves
When you activate the ability, the game checks how many distinct basic land types exist among your lands. Once that number (X) is determined, you choose any combination of colored mana totaling X. You do not have to produce colors matching your lands; for instance, a Forest and a Mountain allow you to produce two Blue mana. This ability does not use the stack and cannot be responded to.
Common Mistakes
A frequent error is trying to produce colorless mana; Prismatic Geoscope explicitly produces colors, so it cannot pay for specific colorless costs like those found in the Wastes-themed sets. Additionally, players often forget that many nonbasic lands, such as Caves of Koilos, do not have basic land types and contribute nothing to X. Always check the type line of your lands for those five specific subtypes.
When to Play It
This card is best suited for mid-to-late game scenarios where you have already established a diverse board of lands. Since it enters tapped, it requires a turn of setup. It is particularly effective in 'five-color' decks where X will frequently be 4 or 5, providing a significant mana advantage for casting high-cost spells.
Interaction examples
Solemn SimulacrumIf you control a Forest and an Island, your Domain count is 2. You play Solemn Simulacrum and use its ability to search for a Plains. Once the Plains is on the battlefield, Prismatic Geoscope will now tap for three mana of any color combination, such as one Red, one Green, and one White.
The One RingWith a full Domain of 5 types (Plains, Island, Swamp, Mountain, and Forest), Prismatic Geoscope taps for five mana. You can use four of that mana to cast The One Ring. This interaction demonstrates how the Geoscope can single-handedly pay for powerful, high-cost artifacts while still leaving you with mana left over.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Prismatic Geoscope
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The colors of mana that Prismatic Geoscope can produce aren't related to the specific basic land types among lands you control. For example, if you control a Plains and an Island, you can activate Prismatic Geoscope's ability to add
.No other card is named in this ruling.
- #2· Wizards of the Coast
You can activate Prismatic Geoscope's mana ability if you have no basic land types among lands you control, but it won't produce any mana.
No other card is named in this ruling.
- #3· Wizards of the Coast
Prismatic Geoscope can't produce colorless mana.
No other card is named in this ruling.
- #4· Wizards of the Coast
To determine the number of basic land types among lands you control, look for the Plains, Island, Swamp, Mountain, and Forest subtypes among the lands you control. Count each subtype that appears one or more times toward the number of basic land types among lands you control. This number can't exceed five.
No other card is named in this ruling.
- #5· Wizards of the Coast
How many lands you control of a particular basic land type is irrelevant to a domain ability, as long as that number is greater than zero. As far as domain is concerned, ten Forests are the same as one Forest.
No other card is named in this ruling.
- #6· Wizards of the Coast
Most nonbasic lands don't have basic land types, even if they produce colored mana. For example, Caves of Koilos is neither a Plains nor a Swamp.
No other card is named in this ruling.
- #7· Wizards of the Coast
Some nonbasic lands do have basic land types. Domain abilities don't count the number of lands you control—they count the number of basic land types among lands you control, even if that means checking the same land twice. For example, if you control a Tundra, a Blood Crypt, and a Forest, you'll have a Plains, Island, Swamp, Mountain, and Forest among the lands you control. Your domain abilities will be maxed out.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Filigree Sages + Prismatic Geoscope
- 1Activate Prismatic Geoscope by tapping it, adding at least
. - 2Activate Filigree Sages by paying
, untapping Prismatic Geoscope. - 3Repeat.
Myr Welder + Staff of Domination + Prismatic Geoscope
- 1Activate Myr Welder using Prismatic Geoscope's ability by tapping it, adding at least .
- 2If Staff of Domination is exiled, activate Myr Welder using Staff of Domination's first ability by paying
, untapping it. - 3Otherwise, activate Staff of Domination's third ability by paying and tapping it, untapping Myr Welder. Then, activate Staff of Domination's first ability by paying , untapping it.
- 4Repeat.
Myr Welder + Voltaic Construct + Prismatic Geoscope
- 1Activate Myr Welder using Prismatic Geoscope's ability by tapping it, adding at least three mana of any color.
- 2If Voltaic Construct is on the battlefield, activate Voltaic Construct by paying , untapping Myr Welder. Otherwise, activate Myr Welder using Voltaic Construct's ability by paying , untapping Myr Welder.
- 3Repeat.
Voltaic Construct + Prismatic Geoscope + Karn, the Great Creator
- 1Animate Prismatic Geoscope using Karn, the Great Creator.
- 2Activate Prismatic Geoscope by tapping it, adding at least three mana of any color
- 3Activate Voltaic Construct by paying , untapping Prismatic Geoscope.
- 4Repeat from step 2.
Voltaic Construct + Sydri, Galvanic Genius + Prismatic Geoscope
- 1Animate Prismatic Geoscope using Sydri.
- 2Activate Prismatic Geoscope by tapping it, adding at least three mana of any color
- 3Activate Voltaic Construct by paying , untapping Prismatic Geoscope.
- 4Repeat from step 2.
Trazyn the Infinite + Staff of Domination + Prismatic Geoscope
- 1Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding at least two mana of any color(s).
- 2Activate Trazyn using Staff of Domination's first ability by paying , untapping it.
- 3Repeat.
Toph, the First Metalbender + Candelabra of Tawnos + Prismatic Geoscope
- 1Activate Prismatic Geoscope by tapping it, adding at least .
- 2Activate Candelabra of Tawnos by paying and tapping it, untapping Prismatic Geoscope and Candelabra of Tawnos as they are lands due to Toph.
- 3Repeat.
Trazyn the Infinite + Pili-Pala + Prismatic Geoscope
- 1Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding at least two mana of any color(s).
- 2Activate Trazyn using Pili-Pala's ability by paying and untapping it, adding one mana of any color.
- 3Repeat.
Legal formats
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Meta decks with Prismatic Geoscope
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