Menace (This creature can't be blocked except by two or more creatures.) Whenever you gain life, put a +1/+1 counter on Blood Researcher.

{X}: Crypt Rats deals X damage to each creature and each player. Spend only black mana on X.

Whenever another creature enters the battlefield, you gain 1 life.

Until end of turn, target creature gains deathtouch and "When this creature dies, return it to the battlefield tapped under its owner's control." You gain 2 life.

Prevent all combat damage that would be dealt this turn. You gain 1 life for each attacking creature.

Put a +1/+1 counter and a lifelink counter on target creature.

Destroy target nonblack creature. It can't be regenerated. You lose life equal to that creature's toughness.

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

({T}: Add {G}.)

Jungle Hollow enters the battlefield tapped. When Jungle Hollow enters the battlefield, you gain 1 life. {T}: Add {B} or {G}.

When Radiant Fountain enters the battlefield, you gain 2 life. {T}: Add {C}.

You gain 4 life. Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life." Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

You draw two cards and you lose 2 life.

Put a +1/+1 counter on up to one target creature. You gain 2 life. You may play an additional land this turn. Draw a card.

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

Exile all creature cards from target player's graveyard. You gain 3 life for each card exiled this way.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.

Put two +1/+1 counters on target creature. It gains vigilance until end of turn.

Exile target nonland permanent. Its controller draws a card.

Scry 2, then draw a card.

Target player draws two cards and loses 2 life.

Destroy target nonlegendary creature.

Flying When Courier Bat enters the battlefield, if you gained life this turn, return up to one target creature card from your graveyard to your hand.

When Dusk Legion Zealot enters the battlefield, you draw a card and you lose 1 life.

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Search your library for a basic Forest card, put that card onto the battlefield tapped, then shuffle. Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

You gain 4 life. If a creature died this turn, you gain 8 life instead.

Target opponent discards two cards, mills a card, and loses 1 life. You gain 1 life. (To mill a card, a player puts the top card of their library into their graveyard.)

Return target creature or land card from a graveyard to its owner's hand. You gain 6 life.

Until end of turn, target creature gets +1/+0 and gains lifelink and "When this creature dies, return it to the battlefield tapped under its owner's control."

Creatures your opponents control get -1/-1 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Equipped creature gets +1/+0. Whenever equipped creature dies, you gain 3 life. Equip {1}

Target creature gets -1/-1 until end of turn. Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

({T}: Add {B}.) Witch's Cottage enters the battlefield tapped unless you control three or more other Swamps. When Witch's Cottage enters the battlefield untapped, you may put target creature card from your graveyard on top of your library.

Magecraft — Whenever you cast or copy an instant or sorcery spell, you gain 1 life.