Dread Dryad Valakut (Casual)

Budget multiplayer deck for casual play only.

Key is, to get Dryad of the Ilysian Grove onto the battlefield so your lands each have every basic land type. With all your lands have each basic land type they will trigger Valakut, the Molten Pinnacle and Dread Presence either.
Dryad and Azusa, lost but Seeking give you additional land drops.
Ramunap Excavator let you play lands like Evolving Wilds or Field of Ruin from your grave after been sacrificed.
Now combo of with Evolving Wilds (that's also a Mountain and a Swamp)

Sylvan Scrying, Knight of the Reliquary and Expedition Map helps you to find Valakut or other needed tool lands like Bojuka Bog, Labyrinth of Skophos or Arch of Orazca.
Radha, Heart of Keld is a better option than Courser of Kruphix.
Commune with Nature helps to find creatures needed, Journey to Eternity // Atzal, Cave of Eternity secures key creatures, Vraska, Golgari Queen can be used as draw engine and spot removal.

Sideboard:
Bojuka Bog and Tormod's Crypt against grave based decks
Labyrinth of Skophos against single creature attacks (like Bogles)
Pestilent Haze against token based decks or to slow down Superfriends
Veil of Summer against black spot removal or blue counter/control decks
Duress and Maelstrom Pulse against non-creature based decks and control

remenber, its Budget and casual only, because of this, there is no Primeval Titan or other expensive cards