Torment of Hailfire

Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.

Smallpox

Each player loses 1 life, discards a card, sacrifices a creature, then sacrifices a land.

Each land is a Swamp in addition to its other land types.

At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land.

Whenever a land an opponent controls enters, that player loses 2 life and you gain 2 life.

{T}: Add {C}.
{1}{B}, {T}: Put target creature card from your graveyard on top of your library.

Imprint — When Chrome Mox enters, you may exile a nonartifact, nonland card from your hand.
{T}: Add one mana of any of the exiled card's colors.

{T}: Add {C}.
{T}, Sacrifice a creature: Add {B}{B}.

{T}: Add {C}.
{3}, {T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

Flying
When Kokusho, the Evening Star dies, each opponent loses 5 life. You gain life equal to the life lost this way.

At the beginning of your upkeep, you draw a card and you lose 1 life.

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

Syphon Soul deals 2 damage to each other player. You gain life equal to the damage dealt this way.