MTG Combo: Doubling Season + Enchanted Evening + Estrid, the Masked

Enchanted Evening makes all permanents become enchantments (in addition to their other types). Estrid's ultimate puts the top 7 cards of your library into your graveyard, then returns all enchantments to the battlefield, then all auras to the battlefield. Doubling Season doubles the counters put on a Planeswalker as it enters the battlefield. So instead of 3 loyalty counters, you have 6, and one use of Estrid's first ability will bring you up to 8. If you have a spell that gives you an extra turn, you can use her ultimate in "one" turn. If every permanent in your deck is now an enchantment, all those permanents are now on the battlefield.