Welcome to the Doomsday Wiki!
The Doomsday Wiki is intended to be the most complete and up to date work on how to cast the card named Doomsday in the Legacy format of Magic: the Gathering.
There is actually much more to how to play the deck, but understanding how to cast the namesake card of the deck is a pretty big piece of the puzzle. This is specifically not a primer as you often see for other decks in Legacy, because primers generally become outdated rather quickly and are more about card choices, decklists, sideboard plans, and so on. The Doomsday Wiki is there to help people to really understand how the deck works and can win in various scenarios.
We have three main variants represented on here that you can access resources for on the left hand sidebar.
Meandeck Doomsday is the primary deck variant that is having previously unprecedented success since the printing of Thassa's Oracle. Meandeck Doomsday uses countermagic like Force of Will and Daze to play a controlling game before ending the game. The moniker Meandeck is explained in this article.
DDFT (Doomsday Fetchland Tendrils) is the closest to historical lists. Although it adopts the current usage of Thassa's Oracle these decks tend to also have access to secondary Storm plans using cards like Burning Wish, Echo of Eons and Tendrils of Agony. They also prefer proactive protection such as Duress over being able to run reactive counter magic.
DDEFT (Doomsday Experimental Frenzy Tendrils) is now an outdated style. This was the main variant available post Gitaxian Probe ban and pre-printing of Thassa's Oracle. These lists use Experimental Frenzy as a card advantage engine and win condition in tandem with Doomsday.