You won't find that one in a LTR Collector Booster, but there's still other serialized treasures to find: The Elven, Dwarven, and Human rings of power each appeared as serialized foil Sol Ring cards (300 Elven, 700 Dwarven, 900 Human) and, as it's usually the case, extended-art and alternate scene cards are exclusive to LTR Collector Boosters
As already mentioned, ACE SPEC cards are making their grand debut in Temporal Forces
You can make infinite mana and get infinite triggers with your ETB effects
Quick Draw also has a lot of solid reprints, especially cards like Veyran, Voice of Duality, Bloodthirsty Adversary, Rousing Refrain, Pongify, Winged Boots, and Shark Typhoon
You can open packs digitally, and if you pull a card you love, you can have the actual, physical version shipped to you
Each Bundle includes 6 booster packs