The Windy City (Black Lotus Unknown Planechase) [Oversize Cards] Elf Warrior This explains why the goblins

This explains why the goblins remain unaffected

You may cast it without pay its mana cost

You may put that card on the bottom of their library

you may return target card from your graveyard with mana value X or less to your hand where X is your devotion to Sultai

That player may pay life equal to that card's mana value

The Windy City (Black Lotus Unknown Planechase) [Oversize Cards] Elf Warrior This explains why the goblinsSet: Oversize Cards Rarity: Common When you planeswalk here and at the beginning of your upkeep, put a flying counter on target nontoken creature you control without flying. Whenever chaos ensues, exile target creature with flying. For as long as it remains exiled, its owner may cast it by paying "o2" rather than paying its mana cost. When you planeswalk away from The Windy City, remove all flying counters from all creatures.