Lotus Petal

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

Swamp

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

Target player draws two cards and loses 2 life.

Search your library for a card, put that card into your hand, then shuffle.

Deathtouch
Whenever you draw a card, you gain 2 life.
Whenever an opponent draws a card, they lose 2 life.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.