Can One Card Make the Difference? - Shadowverse Restarted 2

Our first set of upgrades and we have a difficult choice, either add a bunch of cheap cards making a big change to the deck or spend the entire budget on a single legendary? Is one card really enough to boost the power of the deck? Music Etrian Odyssey Untold the Millennium Girl - Preparing for Tomorrow Pokémon Mystery Dungeon Explorers of Sky - Mt. Horn Intro Music Rise by KV    / kvmusicprod   Outro Music Cubic Z - Diamond Ortiz