Rule 805.6 · Shared Team Turns Option
The Active Player, Nonactive Player order rule (see rule 101.4) is modified if the shared team turns option is used. If multiple teams would make choices and/or take actions at the same time, first the active team makes any choices required, then each nonactive team in turn order makes any choices required. If multiple players would make choices and/or take actions at the same time, first each player on the active team makes any choices required in whatever order they like, then the players on each nonactive team in turn order do the same. Once all choices have been made, the actions happen simultaneously.
Subrules
If more than one player is instructed to draw cards in a game that’s using the shared team turns option, first each player on the active team, in whatever order that team likes, performs that player’s draws, then each player on each nonactive team in turn order does the same.