Antipolar Magneto's first pull can matter before the next card arrives. In the September 4 Marvel Snapcast discussion, a guest reported pulling Red Onslaught, getting Stardust's effect, and then watching the other card fail to drop. Their explanation was that Antipolar Magneto fully resolved each pulled card instead of placing both cards on the board first.
That reported interaction is the reason to look beyond the Power you hope to pull. The first arrival may change the conditions for the rest of the play.
Placing a card and resolving it are different steps
There are two possible sequences to keep separate when you're thinking through a multi-card effect.
In one, the game places the cards on the board before their individual effects resolve. Both arrivals have happened, even though their abilities still resolve in an order. In the other, the first card arrives and resolves before the next arrival happens. Its ability can change the board between those steps.
During the Antipolar Magneto discussion, the hosts described expecting the first kind of sequence and encountering the second. They compared it with other effects that they understood to place cards first, then resolve them.
That comparison explains the surprise. It doesn't make every effect that pulls, adds or copies cards follow a single rule. The operation on the particular card matters, including what happens before the next part of that operation begins.
The Red Onslaught result interrupted the expected finish
The concrete example comes later in the episode. The guest describes Antipolar Magneto pulling Red Onslaught and getting Stardust. The other card then didn't arrive.
The relevant detail is the timing. In the guest's account, the first card's effect had already resolved when the later pull was due. Planning the turn as though both cards were safely on the board would have missed that possibility.
This was a reported testing experience from the September 4 episode. It establishes what the guest encountered and how they explained it; it isn't a complete rules table for every possible Red Onslaught result or Antipolar Magneto board state.
The earlier AXIS card discussion gives the broader context for the cards. This particular issue is narrower: an arrival you were counting on can depend on what the previous arrival does.
Check the first arrival before counting the next
When evaluating this kind of play, start with the cards that could arrive and the effects they can bring. A card's Power may be attractive while its ability changes a later part of the sequence you also need.
Use the MARVEL SNAP card library to find the full named cards involved, then read the effects you're expecting to resolve.
Then separate the result you want from the parts you are assuming. If the first card changes the board, does your planned finish still work? Are you relying on a later arrival to win a second location? Would the first arrival alone leave that location short?
Those questions don't require assigning a made-up failure percentage. They require recognizing which part of your winning position hasn't happened yet. The episode's example is especially relevant when you're counting the value of a random result before seeing what that result is.
Don't turn one report into an entire pull-order rule
The earlier conversation also describes an order for the locations. That detail should not be expanded into a universal prediction for every placement and board state from this discussion alone. Likewise, the Stardust example doesn't establish that every other possible blocking effect will behave identically.
For the specific reported case, the practical limit is clear: both pulled cards were not safely in place before the first resolved. If your winning line needs the later card to arrive, leave room in your evaluation for what the first card can do before you count the finished board.
