Endurance is a flash 3/4 reach body that can come down as a blocker against their early green aggression, and its enter trigger can put a graveyard on the bottom of a library, though that matters little in this matchup. Containment Priest is a strong flash body here: Green Sun's Zenith, Natural Order and Eladamri put creatures onto the battlefield without casting them, so the Priest exiles those creatures instead, along with Dryad Arbor. Wrath of the Skies as a second sweeper punishes their pile of one-mana creatures, since a small X clears the mana elves. Carpet of Flowers stays in the sideboard because Elves has no Islands for it to count, so it would never produce mana. We trim Spell Pierce and a Force of Negation because most of what Elves does early is cast cheap creatures, which those spells can't hit, and Allosaurus Shepherd makes their green spells uncounterable once it is on the battlefield. Keep Leyline Binding and Swords to Plowshares as our primary answers to their one-drop mana creatures and big threats like Craterhoof Behemoth and Atraxa.