Elsa, the Fifth Spirit Lorcana has multiple versions of Elsa, but the Fifth Spirit variant is one of the best picks due to its utility against Evasive characters
Other notable cards are the other Merlin and Madam Mim cards, all of which play off each other and form the foundation of the new bounce archetype, and Pinocchio Star Attraction, a low-cost card with three Lore
From playing with the heroes such as Yuna, Wakka, and Auron, to even finding uses for the minor moments such as the traveling shopkeeper Oaka constantly asking you for money (though in MTG hes after your counters to exchange for drawing more cards)
When you factor in the back half, things get truly outrageous
Though young and implusive, they gain Hilda's trust and are allowed to join her battle against the empire
Saga creatures do everything a normal saga does, and are affected by everything that affects a normal saga (from counter doublers to proliferation)