Its not particularly affordable for everyone, however
Cinderella, Ursula
Without it, your only source of ramp are mana rocks, so you want to get The Reaver Cleaver going as soon as you can
First up we have the first Avenger himself, with Captain America, First Avenger (rocking the one red, one white, and one blue mana cost), who utilizes a new Throw and Catch mechanic that lets players dish out damage by hurling pieces of equipment is equipped on him at his foes, and then freely equip some gear (the same or something else) afterward
Outside the core are also multi-aspect cards
Even though I was at GenCon for Disney Lorcana s big debut last year, observed the first-ever starter deck challenge at the event, and have hundreds of cards across each of the sets released so far, I am absolutely atrocious at actually playing the game