In Riftbound, does the winner of the die roll get to choose whether to go first or second, or are they required to go first?

Ruling: The winner of the die roll gets to choose whether to go first or second.

Sequence: (for game setup)

• Reveal legends, chosen champions, and battlefields
• Roll to determine who picks turn order
• Winner chooses to go first or second
• Draw 4 cards and mulligan

Nuances:

• In best of 3 matches, the player who loses the previous game gets to choose if they go first or second in the next game