If you need one specific card, buy the single
Eng tells us that the Enchanted art style in Ursula's Return "has a fluid, painterly quality that is meant to express the flow of magic ink and otherworldliness surrounding Ursula's lair in Lorcana"
Except the best aggro deck in the format cares about attacking with all its creatures, big and small: Creatures (25) 3 Rekindling Phoenix 4 Boros Challenger 4 Legion Warboss 4 Goblin Banneret 3 Aurelia, Exemplar of Justice 4 Swiftblade Vindicator 3 Tajic, Legion's Edge Lands (24) Spells (11) As a mechanic, Mentor poses countless ways to approach combat, but at face value, what we know is that attacking with multiple creatures a turn is the place to be
The flying vehicles help with that, plus they provide artifacts for cards like Urza, Lord High Artificer
Mirari's Wake is also fairly valuable, at $7.38, and there's also Dakkon, Shadow Slayer ($11.73) and Geyadrone Dihada ($11.03)
Bruna and Gisela being Eldrazi-fied by Emrakul and melded together into a horrifying amalgamation of angel and Eldrazi is admittedly horrifying