It would be in Commander products that wed see the first stones that started the avalanche
To get the whole picture, you need to collect all of the cards
Hermit Druid, Life from the Loam, Entomb, Buried Alive, Faithless Looting, Wheel of Misfortune, Frantic Search, and Bazaar of Baghdad are all great ways to do the former
Crow, or Skull Meister to your deck, either in the main or side
Counterplay for this creature is rather limited, and will generally result in one player getting blown out, but as long as two or more opponents are alive after Emrakul touches down, the card dies to a board wipe
For example, if Grist, the Plague Swarm enters the battlefield during combat, there will be an opportunity for your opponent to remove it before you can activate one of its abilities