At the beginning of your upkeep, Second Chance triggers, sacrificing itself and causing you to take an extra turn after this one.
In your combat phase, declare any two creatures as attackers.
When you attack, Eiganjo Dynastorian triggers, becoming prepared.
During your second main phase, cast a copy of Replenish from exile by paying 3, returning Second Chance and any other enchantment cards from your graveyard to the battlefield.