Rivals of Aether uses the game's official ruleset.
3 stocks 8 minutes
All stages are legal.
When playing game 1 vs your opponent, the game will automatically highlight the starter stages. They are:

• Merchant Port
• Tower of Heaven
• Aetherial Gates
• The Forest Floor
• Julesvale

Winner bans 3 stages. Loser cannot return to the last stage they won on (MDSR).