Below is some more detailed general info about how battles and Sieges work
Jeskai Flashback has one fairly unpopular commander in Zetalpa, Primal Dawn and one popular commander in Talrand, Sky Summoner, while Naya Populate gets the same, with Emmara Tandris being fairly unpopular and Trostani, Selesnya's Voice being fairly popular
If an ability allows you to do something on or during "each of your turns", that permission resets after your ending phase
[EFFECT] Special Summon 1 Effect Monster from your hand to your field face-up
(Leads to: Mad Wizard's Lair) Mad Wizard's Lair Draw three cards and reveal them
All face-up monsters your opponent controls are changed to Attack Position, and cannot change their battle position this turn