The reason is because the UW one feels like the default commander and White makes Allies the best for waterbending purposes, but Black offers some really powerful waterbending spells and more Clues for waterbending purposes
Most novelty gold cards contain no real gold at all

The following cards are banned in the 2024 Modern Format: Ancient Den Arcum's Astrolabe Birthing Pool Blazing Shoal Bridge From Below Chrome Mox Cloudpost Dark Depths Deathrite Shaman Dig Through Time Dread Return Eye of Ugin Faithless Looting Field of the Dead Fury Gitaxian Probe Glimpse of Nature Golgari Grave-Troll Great Furnace Green Sun's Zenith Grief Hogaak, Arisen Necropolis Hypergenesis Krark-Clan Ironworks Lurrus of the Dream-Den Mental Misstep Mox Opal Mycosynth Lattice Mystic Sanctuary Nadu, Winged Wisdom Oko, Thief of Crowns Once Upon a Time Ponder Punishing Fire Rite of Flame Seat of the Synod Second Sunrise Seething Song Sensei's Divining Top Simian Spirit Guide Skullclamp Splinter Twin Summer Bloom Tibalt's Trickery Treasure Cruise Tree of Tales Umezawa's Jitte Up the Beanstalk Uro, Titan of Nature's Wrath Vault of Whispers Violent Outburst Yorion, Sky Nomad All Banned and Restricted Cards For Vintage Format In 2024 Every Disallowed Card For Vintage Format The Vintage format allows players to include cards from when the game was first released, containing the most wide-open card pool of all sets

Dinosaurs are often aggressive, high-power/toughness creatures with combat on the mind
Thankfully some of the other options based on Team Rockets Mewtwo seem to be a bit more reasonable
No need to touch your deck before hand or depend on its randomization