Everything you need to construct a deck is in your Prerelease Pack , except for Basic Lands, which stores provide
The Golgari color identity is surprisingly resilient for this archetype
4 Esika, God Of The Tree // The Prismatic Bridge Free Spells Every Turn Almost anytime you build an Esika, God of the Tree and The Prismatic Bridge you will find yourself moving towards a legendary matters deck by sheer nature of the power of these cards
You need a specific strategy that doesnt care about this effectperhaps you use cards like Winota, Joiner of Forces and Zur the Enchanter to get cards into play without casting them
You could do worse than try to double that with Wulfgar of Icewind Dale, too
This was one of the better decks to play out of the box, but in terms of upgrading, it's another "strip for parts" scenario