Hi! Thank you for your kindest words :) I hope you will enjoy the game.
About your question: the standard Paragon System flow for a scene is: the GM reveals the scene (frames the scene) and the players will play it (it's a roleplaying game, of course). Then, the GM should ask leading questions, pushing the scene to a Trial (a conflict). The conflict will lead to the next situation (next scene).
During the first phase, you are in the free game. Some GMs prefer having a short scene and moving from a scene to the next with high pacing. But you can extend this phase as you (and the other players) want.
Finding a secret door can reveal to the player different options to face the enemies, or opening a chest can add Advantage Dice to the players, for example.
I really like to work with the Paragon System framework because it's very freely in these details.
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To use the Wild Magic you need to spend Magic Scroll charges. The more chargers you spend, the more powerful will be the effect - BUT more dangerous can be the consequences of the Wild Magic: per each charge spent, you will roll one time on the Wild Magic Effect table.
The Knowledge Domain is used to face contents of Knowledge like, i.e., solving a puzzle or talking with an ancient God in a forgotten language.