Selecting your opponents
Upon pressing the Raid button, you are brought to a screen with three random players. These players are ordered from easiest to hardest, from left to right. The opponents power level is also displayed as a purple fist icon. Other details on display are the amount of trophies you can obtain. The harder the opponent, the more trophies you gain. The amount of gold that you may steal from their chest is also displayed.
There is also a maximum of four raid tickets. These regenerate at a rate of one ticket every two hours. At the opposite side, is the Refresh button which has a gold cost that gets expensive the more you use it to shuffle the available opponents. Use it if you don't think you can win or if the opponents are too weak and you want a better challenge. The refresh's cost resets after a long while.
Pressing the scout button brings you to the next screen where you will see the complete makeup of the hero team, the amount of honor scrolls you will gain if you win, and a more detailed version of the trophy gain or loss. A positive number means you get that amount if you win. A negative value means that number will be deducted from your current trophy count.
Choose an opponent and select your team composition. You do not always have to counter your opponents team. If your opponent has a hero or heroes you have no way of countering, you can choose another opponent or you can brute force your way past them.