Stop saying that push mastery can make two or more enemies prone
Many people have argued that the push mastery by making two enemies occupy the same space can make them prone at the end of your turn. Here I'd like to argue that rules as written (RAW) most probably does not support it and that rules as intended (RAI) obviously does not support it.
RAW. The interpretation that push mastery can make two enemies prone comes from this text:
"Moving around Other Creatures
During your move, you can pass through the space of an ally, a creature that has the Incapacitated condition (see the rules glossary), a Tiny creature, or a creature that is two sizes larger or smaller than you.
Another creature’s space is Difficult Terrain for you unless that creature is Tiny or your ally.
You can’t willingly end a move in a space occupied by another creature. If you somehow end a turn in a space with another creature, you have the Prone condition (see the rules glossary) unless you are Tiny or are of a larger size than the other creature."
The proposed interpretation: if you move a creature to an occupied space, both will become prone at the end of the turn.
Observe that the whole section is written with you in mind. It's about your own movement. In no moment forced movement is mentioned or what happens to other creatures when you move them. Designers probably didn't consider that in this text.
So, what happens to creatures when they are moved against another creature: the only RAW information is that we do not know. I couldn't find any text that says that they can occupy the same square on a grid or that alternatively they stay on the next square.
However, multiple abilities in the game, including high level spells like etherealness and blink move you to the next square when you return to the same square of someone else. So, why would a first level mastery force two creatures to stay in the same space?
RAI: there is a very strong mastery that requires a save to make people prone. Its name is topple. Why would the designers bother to make such a strong mastery when another one moves enemies and can make two or three enemies prone at the same time? Of course, size restriction and positioning would matter more, but the ceiling of a level 1 mastery would be disproportional. This sounds like people trying to kill BBEGs at tier 3 suffocating them with the Shape Water cantrip. Don't be this person.
Conslusion:
There is no RAW support for the interpretation that push mastery causes enemies to be prone and RAI is clear when one considers the mastery system as a whole.
Edit: for clarity, as this has been asked multiple times . "You" here means any willingly moving creature, the active voice of the sentence. It can be a PC or a NPC. The point is that this section would not have the receivers of an action in mind, in other words, those suffering from forced movement.