Infernal Contract

Draw four cards. You lose half your life, rounded up.

Polluted Delta

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

Exile Elvish Spirit Guide from your hand: Add {G}.

Exile a card from your hand: Add {B}{B} or {G}{G}.

Target player draws X cards and loses X life.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

Draw four cards. You skip your next turn.

Draw three cards, then put two cards from your hand on top of your library in any order.

{T}, Sacrifice Lotus Petal: Add one mana of any color.

{T}, Pay 1 life, Sacrifice Misty Rainforest: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

{T}, Pay 1 life, Sacrifice Verdant Catacombs: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.