If they have a card in their pack that you like the look of then you are able to use Wonder Pick to randomly select a single card from their pack for yourself (this doesnt take the card away from them however)
Which walker represented White in the initial release
They're the cards people usually slow-roll to the back of the pack, hoping for something that either wins games, upgrades a deck, or at least pays for your $6.00 hotdog at most sanctioned events
Gaea's Cradle taps for 1 green mana for each creature you control, which is why it shows up in Commander creature piles and Legacy Elves-style decks that flood the board

Advanced Search Sets Random Syntax Airship Engine Room Baron, Airship Kingdom Bountiful Landscape Caldera Lake Cascade Bluffs Castle Sengir Coastal Peak Crackling Falls Crosis's Catacombs Crumbling Necropolis Crypt of the Eternals Crystal Quarry Desolate Lighthouse Eroded Canyon Exclusive Nightclub Ferrous Lake Fiery Islet Frontier Bivouac Frostboil Snarl Highland Lake Izzet Boilerworks Izzet Guildgate Ketria Triome Library Molten Tributary Mystic Monastery Nivix, Aerie of the Firemind Oscorp Industries Peculiar Lighthouse Perilous Landscape Prismari Campus Raugrin Triome Restless Spire Riverpyre Verge Scorched Geyser Seething Landscape Shivan Reef Silverbluff Bridge Spectacle Summit Spirebluff Canal Stark Industries Steam Vents Stormcarved Coast Sulfur Falls Surtland Frostpyre Swiftwater Cliffs TCRI Building Temple of Epiphany The World Tree Thundering Falls Training Center Turbulent Springs Volatile Fjord Volcanic Island Wandering Fumarole Xander's Lounge

The ability had already triggered, so what happens to that noncreature spell now is irrelevant