Harness
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Under construction
Expect many and frequent revisions to this content.
“Be patient.”
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| Harness | |
|---|---|
| Keyword Action | |
| Introduced | Marvel's Spider-Man |
| Last used | Marvel's Spider-Man |
| Reminder Text | Harness [card name] (Once harnessed, its origin ability is active.) |
| Scryfall Statistics | |
Harness is a keyword action introduced in Marvel's Spider-Man.[1][2] It is unique to the set's Infinity Stone, but is expected to be used in future Marvel sets, as well.
Description
Each Terminus Stone has a pair of linked abilities. The first of the two allows its controller to harness the stone, giving it the "harnessed" designation. The second is the stone's origin ability, which can only be used or becomes active while the card has its "harnessed" designation.
Origin ability
Once the harnessed designation has been achieved, the card's Origin ability becomes active for the rest of the game.[2]
The Universes Beyond Infinity Stones refer to this ability as the 
(infinity) ability instead.[3]
Rules
Rulings
- "Harnessed" is a designation that the permanent has once an ability instructs you to harness it. It has no special rules meaning other than being a designation that the ∞ ability (and, theoretically, other effects) can see.
- Until it is harnessed, The Soul Stone doesn't have the ability listed after the infinity symbol. It also doesn't have that ability in zones other than the battlefield.
- Being harnessed isn't copiable. If something else becomes a copy of The Soul Stone, it must be harnessed separately. Similarly, if The Soul Stone is already harnessed and becomes a copy of something else, it stays harnessed, though it's very likely that won't be relevant until that copy effect ends.[4]
Example
Example
The Terminus of Return 
Legendary Artifact — Terminus Stone
Indestructible
: Add .
, , Exile a creature you control: Harness The Terminus of Return. (Once harnessed, its origin ability is active.)
Origin — At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.
References
- ↑ Magic: The Gathering (August 1, 2025). "Revealed earlier today by Marvel as part of #SpiderManDay:". Bluesky.
- ↑ a b Matt Tabak (August 29, 2025). "Magic: The Gathering® - Marvel's Spider-Man Mechanics". magicthegathering.com. Wizards of the Coast.
- ↑ John Schork (September 1, 2025). "MTG Arena Announcements – September 1, 2025". magicthegathering.com. Wizards of the Coast.
- ↑ Jess Dunks & Eric Levine (September 5, 2025). "Magic: The Gathering® - Marvel's Spider-Man Release Notes". magicthegathering.com. Wizards of the Coast.