That ice-blue color palette is arguably the best-looking holo effect in the entire Fossil set
This may not be necessary, however, given the Dragons second ability, which lets him regenerate for just two black mana, thus avoiding the majority of destruction-based removal
Against mono-colored decks, Oona can quickly wreck a player's game by removing all sorts of powerful cards they might be hoping to draw while steadily pumping out more and more tokens
White planeswalkers can summon individually weak creatures that are collectively strong as a group such as soldiers, as well as powerful creatures and leaders that can strengthen all of the player's creatures with additional abilities or strength
There are a ton of black-based decks that love to sacrifice things (and drain and gain, for that matter), so I think this will see some play
Gold cards that only go in one slant of an archetype are already too narrow for a drafting cube