So this has a few conditions
It's very Commander-playable, so if you want the novelty of borrowing arrows, you can do that
It periodically updates the banned list and clarifies rules as necessary
It provides a top-end enchantment that will buff your whole board for as long as it sticks around, and the knight you can make with its Adventure ensures you don't risk missing your two-drop by including it
While cards may be initially placed in the wrong power bracket from the start, MTG hopes that through community feedback they can adjust what cards are in which bracket over time so they are relatively in line with how the community perceives each card
At that point, Belle & Beast Certain as the Sun surviving two turns is probably going to be enough to win any given game of Disney Lorcana outright, which is more than enough to make it the hottest chase card in all of Attack of the Vine