What is the proper order to reveal champions and battlegrounds when starting a Riftbound game?

Ruling: Champions and battlegrounds are chosen and revealed before shuffling, determining first player, and mulligans. They are never kept face down - both players reveal them at the same time during the setup sequence.

Sequence:

• Choose legend
• Choose champion (reveal at this point)
• Choose battleground (reveal at this point)
• Shuffle and cut runes and main deck
• Determine who goes first
• Draw opening hand
• Mulligan (first player mulligans first, second player can react to that information)
• Begin play

Nuances:

• In formats with registered lists, the champion is part of the registered list and must be revealed (not chosen) - you cannot change your champion based on the legend you see
• The player going first must mulligan first, allowing the second player to react based on that information