People want to see the final price and witness another big moment in collectibles history as it happens
Like most Pokmon cards, the value of Castform depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Legends Awakened)
There is a demand for being a competitive player
Time travelling is a new mechanic in Universes Beyond: Doctor Who that lets you either add or remove a time counter on your suspended cards, allowing you to cast a whole host of cards at the same time for just seven mana
Simply Summon it, use the negated one as fodder to special summon another U.A., then re-summon the one you needed
The question of how many surveil lands to include in your deck varies depending on the strategy