Lifeleach

Target opponent loses 3 life and you gain 3 life.

Madness {B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Boseiju enters tapped.

{T}, Pay 2 life: Add {C}. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

{2}, {T}: Add {B} for each Swamp you control.

Spend only black mana on X.

Consume Spirit deals X damage to any target and you gain X life.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Whenever you tap a Swamp for mana, add an additional {B}.

Target player loses 3 life. You gain 3 life and create three 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this token: Add {C}."

Unless target player pays {3}, that player loses 5 life and you gain 5 life.

Sorin's Vengeance deals 10 damage to target player or planeswalker and you gain 10 life.

Target player loses 4 life and you gain 4 life.

Target player loses 3 life and you gain 3 life.

({T}: Add {B}.)

Target player loses 2 life and you gain 2 life.

Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Taste of Blood deals 1 damage to target player or planeswalker and you gain 1 life.

Target player loses 2 life and you gain 2 life.

Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)