The Aftershock (Legacy)

Wurm Deck all Green baby, this is some crazy shit.

The key to this deck is getting that mana stacked up as quick as possible. The key to doing this is getting a starting hand that has as many forests and/or mana producing spells such as Cultivate, Kodama's Reach and Rampant Growth. A great combo would be to get an Arbor Elf and use it on a land that has Wild Growth for another 2 forests. Exploration works wonders with this deck as it allows you to get those forests out faster than you already are.

You won't have a lot of early game defence, you probably won't have any at all to be honest, but once you've got your creatures out they're very difficult to stop, and with the proper ramping you could be getting your wurms out on turn 4-5.

Examples of Wurms to look out for are;
Pelakka Wurm: This is a great quick 7 life and even if it dies it'll let you draw a card.
Plated Slagwurm: This is a great Wurm for those times where you're afraid of a spell messing with your worms. Get this bad boy out and put the preassure.
Voracious Wurm: This one works wonders if played together with Pelakka Wurm or Predator's Rapport, if played after Pelakka Wurm you'll get a 9/9 for 2 mana
Engulfing Slagwurm: This one is dangerous, effectively destroys any creature blocking it BEFORE the combat damage is dealt, combine this with Lure and you've got a board clear.
Elderscale Wurm: This card is the one that makes up for all of that early game damage you're gonna be taking, once this comes out it'll give you some breathing room.

Just watch out for Blue Decks