As for 2 Polymerization and 2 Dark Fusion
Because nobody knows where it'll turn up, there's a chance you could stumble upon one of the rarest MTG cards in the world by chance
With the conclusion of this auction, Paul not only broke his own Guinness World Record, but also claimed another for most expensive trading card sale, previously held by the Dual Logoman Autographs Michael Jordan & Kobe Bryant basketball card which sold for $12.932M last year
While many sets see their values fluctuate wildly after launch, Umbreon ex has demonstrated incredible resilience, resisting market dips better than almost any other alternate art card from the Scarlet & Violet era
If you sacrifice a card from your security stack, you can also protect this card or your other Angel Digimon from removal effects

Absorb Absorb Energy Absorb Identity Absorb Vis Absorbing Man Absorbing Man and Titania Arborback Stomper Blorbian Buddy Borborygmos Borborygmos Enraged Borborygmos and Fblthp Carnelian Orb of Dragonkind Chaos Orb Dispersing Orb Forbid Forbidden Alchemy Forbidden Crypt Forbidden Friendship Forbidden Lore Forbidden Orchard Forbidden Ritual Forbidding Spirit Forbidding Watchtower From Under the Floorboards Gate to Manorborn Gorbag of Minas Morgul Honorbound Page Jade Orb of Dragonkind Kivni, Orb Weaver Lapis Orb of Dragonkind Maulfist Doorbuster Mesmeric Orb Mindlock Orb Morbid Bloom Morbid Curiosity Morbid Hunger Morbid Opportunist Morbid Plunder Morbius the Living Vampire Navigation Orb Orb of Dragonkind Orb of Dreams Orb of Origin (playtest) Orbital Plunge Orbs of Warding Orbweaver Kumo Plumb the Forbidden Polygraph Orb Pygmy Razorback Rankle and Torbran Resurrection Orb Scourglass Static Orb Torbran, Thane of Red Fell Torpor Orb Winter Orb Witchbane Orb Woolly Razorback Zuran Orb