However, most decks need a way to remove the opponent's stadium and stop them from gaining an advantage, and stadium cards can often be difficult to search from the deck
If you are foiling out a Commander deck, chasing a specific borderless mythic, or collecting every variant of a set, collector boosters concentrate those premium cards in a way that play boosters simply cannot match
Plant/Pendulum/Effect
Otherwise, Black Skull Dragon functions well enough by itself to be worthwhile in most scenarios.
For my money, Animated Army is probably the Bloomburrow precon that has a strategy best suited to competitive play
No matter what cards were designed for them, with The Ur-Dragon and O-Kagiachi headlining the same deck side-by-side, one of them was going to feel underwhelming, and its definitely O-Kagiachi