The set at a glance
| Property | Value |
|---|---|
| Set name | Marvel’s Spider-Man |
| Set code | SPM |
| Release date | 26 September 2025 |
| Prerelease | 19 September 2025 |
| Card count | 300 |
| Type | Universes Beyond, Standard legal |
The important structural point: this is a Standard legal Universes Beyond set, not a Commander only product. That is the model Wizards has moved to for licensed crossovers, and it means these cards compete in constructed rather than sitting in a separate casual pool.
The new mechanics
Three genuinely new things arrived with this set, plus two returning ones. Reminder text tells you what they do. What follows is what they change about how you play a turn.
| Card | Type | Why it is here |
|---|---|---|
| Web-slinging | Alternative cost | Return a tapped creature you control to hand and pay the web-slinging cost instead of the mana cost. Rewards attacking first, then converting a spent attacker into a discount. |
| Mayhem | Reworked madness | Play a card you discarded at any point this turn, rather than only at the moment of discard. Removes the timing trap that made madness awkward. |
| Harness | Activation cost | Pay a cost to permanently switch on a permanent larger ability. The Soul Stone is the flagship, requiring exiling a creature alongside the mana. |
| Connive | Returning from New Capenna | Draw a card, discard a card, and add a plus one/plus one counter if the discard was nonland. Pairs directly with mayhem, since conniving fuels it. |
| Modified | Returning | Cards that care whether your creatures have counters, Auras, or Equipment on them. The payoff structure for the counter half of the set. |
Web-slinging, and the tempo trap
Web-slinging is the set’s signature mechanic and the easiest one to misplay.
The cost is: return a tapped creature you control to its owner’s hand, plus the web-slinging cost. Since attacking taps your creatures, the natural line is to attack, then use a tapped attacker as part of the cost to deploy something bigger after combat.
That is genuinely efficient, and the trap is that it is not free.
You are returning a creature to hand. Your board goes down by one body. If the creature you bounce cost four mana, you now have to spend four mana again later to redeploy it. The web-slinging discount has to be larger than that replacement cost for the play to be good.
The best targets are cheap creatures. Returning a one or two drop that has already attacked costs you very little to recast. Returning your best creature to save mana on a slightly better one is usually a mistake.
It is worst when you are behind. Reducing your own board while your opponent is attacking is exactly wrong. Web-slinging is an ahead-and-pressing mechanic.
The clean version of the rule: web-sling with your cheapest tapped creature, and only when the mana you save exceeds the mana to recast it.
Why mayhem is better than madness ever was
Madness has a well-known problem: it triggers only at the moment of discard, and you must cast the card right then. Discard at the wrong time and the card is simply gone.
Mayhem changes the timing to any point during the turn in which it was discarded. That single change fixes the mechanic:
- You can discard early, develop your board, and cast the mayhem card later in the same turn
- You are not forced to cast a card you cannot afford at the moment of discard
- Discard outlets stop being a liability and become setup
Combined with connive returning in the same set, the discard-and-payoff loop is much tighter than in previous madness sets. Conniving is card selection that fuels mayhem, which means the two mechanics are doing each other’s work rather than competing for slots.
Harness and the permanent switch
Harness is a cost you pay once to upgrade a permanent permanently.
The permanent sits on the battlefield in a lesser state. Pay the harness cost and it switches on its larger ability for the rest of the game. The Soul Stone is the flagship example, and its harness cost includes exiling a creature you control on top of the mana.
Two things follow:
It is a mana sink that survives removal timing. Unlike a large creature you cast in one go, a harness permanent enters cheaply and upgrades later, which spreads the investment across turns and gives the opponent fewer clean moments to answer it.
The cost is usually more than mana. Exiling a creature is a real cost, and it means harness permanents are best in decks that generate expendable bodies rather than in decks with a few large threats.
How the preview season went
Worth recording, because it is the pattern licensed sets follow.
Previews ran in the weeks before the 19 September prerelease, with cards revealed across official Wizards channels and a wide range of community outlets. The card image gallery on the official site is the authoritative source once a set is fully revealed, and it is the place to check rather than any aggregator.
The set’s reception was mixed, which is worth noting without overstating it. The mechanics were generally well received. The wider debate was about the pace of Universes Beyond releases becoming Standard legal rather than about this set’s design specifically, and that debate has continued through the 2026 releases.
How these mechanics play together
The set is built around two loops that intersect, which is what makes it coherent rather than a collection of unrelated keywords.
The discard loop. Connive draws and discards. Mayhem lets you play what you discarded later in the turn. So a connive trigger is not card filtering that costs you a card, it is card filtering that sets up a discounted play. In a deck with several mayhem cards, conniving is close to pure upside.
The counter loop. Connive also adds a plus one/plus one counter when the discarded card was nonland. Modified cares about creatures carrying counters. So the same trigger that fuels mayhem is also switching on your modified payoffs.
That means a single connive trigger can do three jobs at once: filter your hand, set up a mayhem card, and turn on a modified payoff. Recognising that is what separates a deck that plays the set from a deck that plays the individual cards.
Web-slinging sits slightly outside both loops, and that is deliberate. It is the aggressive mechanic, and it wants a low curve and a board rather than a graveyard. Decks tend to pick either the discard and counters half or the web-slinging half, and the ones that try to do both are usually worse at each.
Reading a set during preview season
A general method, using this set as the example, since it applies to every set that follows.
Find the official mechanics article first. Wizards publishes one for every set, and it is authoritative. Community explanations frequently get edge cases wrong in the first week.
Read the reminder text on the commons, not the rares. Commons show you what the mechanic is meant to do in an ordinary game. The rare that breaks it tells you nothing about how the format plays.
Count how many cards carry each mechanic. A mechanic on twenty commons shapes limited. A mechanic on three rares does not, no matter how loud the previews are about it.
Wait for the full gallery before judging. Preview season reveals cards in an order designed to generate interest, not in an order that represents the set. Individual cards look far stronger or weaker in isolation than in the finished pool.
Where to see every card
For browsing the complete set rather than the mechanics, the card list page covers the rarity breakdown, the special treatments, and how to search the set efficiently. The official card image gallery and Scryfall both carry the full 300 cards with images.