What is the correct procedure to start a game in Riftbound?

Ruling: The correct game start procedure is: place hidden champion and legend, reveal both, choose one BF from 3 and place it hidden, reveal BF, determine turn order randomly, then draw and mulligan (with player 1 mulliganing first, then player 2).

Sequence:

• Players place hidden champion and hidden legend
• Both players reveal champion and legend
• Players choose one BF from 3 and place it hidden
• Both players reveal their chosen BF
• Turn order is chosen by one random method
• Players draw cards
• Player 1 mulligans first
• Player 2 mulligans second
• Turn 1 begins

Nuances:

• The second player mulligans after the first player, which provides a small informational advantage (seeing opponent's mulligan decisions can inform your own mulligan choices)
• BF selection happens before turn order determination, as this can affect mulligan decisions