The ultimate is good, but not game-ending
If you have to abandon your first three picks, and the last four or so picks are bound to be unplayable, that leaves you at most seven picks to contribute toward the deck in pack one

Number Three Elves | Legacy | Reid Duke, 2022 North American Legacy Championship Creatures (28) 1 Leaf-Crowned Visionary 2 Birchlore Rangers 2 Craterhoof Behemoth 3 Heritage Druid 4 Allosaurus Shepherd 4 Elvish Visionary 4 Nettle Sentinel 4 Quirion Ranger 4 Wirewood Symbiote Planeswalkers (1) 1 Grist, the Hunger Tide Instants (2) 2 Once Upon a Time Sorceries (10) 2 Natural Order 4 Glimpse of Nature 4 Green Sun's Zenith Lands (19) 3 Forest 1 Misty Rainforest 1 Verdant Catacombs 2 Bayou 2 Boseiju, Who Endures 2 Dryad Arbor 2 Windswept Heath 2 Wooded Foothills 4 Gaea's Cradle Sideboard (15) 1 Abrupt Decay 1 Snuff Out 1 Dismember 1 Collector Ouphe 1 Assassin's Trophy 2 Endurance 4 Leyline of the Void 4 Thoughtseize Once upon a time [no relation] the best creature you could get with a Natural Order was a Verdant Force
On the other hand, Narset, Parter of Veils can inadvertently win you the game when paired with a wheel effect from something like Windfall
As an instant spell, the 1-mana Scout's Warning lets you play your next creature with flash regardless of whether it's your turn or not, while Empty City Ruse completely skips a target opponent's attack phase for only a single white mana