Halo Fountain isn't necessary to win the game, and it acts as a solid "plan B" to the primary win condition of winning through traditional combat means
DECAYED Undead Unleashed introduces cards that create a horrifying number of Zombie tokens with decayed
Yes, they technically have a mana value of 0
Its got the awesome worldbuilding that people loved about Khans of Tarkir , and it even manages to borrow the dragons from Dragons of Tarkir without feeling like a rehash of the lesser, 2-color set
Ron Spencer, by the way, went the extra distance to make the art as funny as possible
You can pay one black mana and sacrifice another creature to have a player mill three cards, which is cool, but you can also pay one life to add one colorless mana which can only be used to cast spells from your graveyard