Attacking Pests you control get +1/+0 and have menace.
Whenever a nontoken creature you control dies, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."

When this enchantment enters, creature cards in your graveyard perpetually get +1/+1.
Blight X, Return this enchantment to its owner's hand: Return target creature card with mana value X or less from your graveyard to the battlefield. X can't be greater than the greatest toughness among creatures you control. Activate only as a sorcery.

Noncreature spells you cast cost less to cast.
Whenever you cast a noncreature spell, counter that spell unless you sacrifice a creature.

Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life.

At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment. (Damage dealt by sources without infect causes loss of life.)
Whenever a card is put into an opponent's graveyard from anywhere, if this enchantment has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life.

Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.

Enchant creature
Enchanted creature gets +3/-3.

At the beginning of each player's upkeep, that player discards a card at random.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
You may sacrifice a creature. If you do, each opponent discards a card.
Return target creature card from your graveyard to your hand.
Target opponent may sacrifice a nonland, nontoken permanent of their choice. If they don't, they lose 2 life and you draw a card.

At the beginning of your upkeep, sacrifice this enchantment unless you pay .
At the beginning of your end step, create a 0/1 black Thrull creature token.

Whenever a nontoken creature is put into your graveyard from the battlefield, if this card is in your graveyard, create a 2/2 black Zombie creature token.
When a creature is put into an opponent's graveyard from the battlefield, if this card is in your graveyard, exile this card.

Enchant creature or land
When enchanted permanent becomes tapped, destroy it.

At the beginning of your upkeep, if you have no cards in hand, sacrifice this enchantment and target opponent discards their hand.

Whenever a player casts a spell, that player discards X cards, where X is the number of cards in all graveyards with the same name as that spell.

When this enchantment enters, if you cast it, destroy all nonenchantment creatures.
Whenever this enchantment or another enchantment you control enters, until end of turn, this enchantment becomes a legendary 6/6 Nightmare God creature with menace and deathtouch. It's still an enchantment.

At the beginning of your upkeep, the Ring tempts you.
Whenever you choose a creature as your Ring-bearer, you may pay 2 life. If you do, draw a card.

, Discard a card: Create a 1/1 black Vampire Knight creature token with lifelink. Activate only once each turn.

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment.

At the beginning of your end step, if you descended this turn, put a +1/+1 counter on target creature you control.
, Sacrifice this enchantment: Create a 4/3 white and black Vampire Demon creature token with flying.

Whenever a creature enters, you lose 1 life and add .

Enchant creature you control
When this Aura enters, you may put a -1/-1 counter on target creature.
Enchanted creature gets +1/+1 and has lifelink.

When this Case enters, destroy up to one target creature that was dealt damage this turn.

To solve — Three or more creature cards were put into graveyards from anywhere this turn. (If unsolved, solve at the beginning of your end step.)

Solved — This Case is a 4/4 Gorgon creature with deathtouch and lifelink in addition to its other types.

When this Case enters, create a 2/1 black Skeleton creature token and suspect it.

To solve — You control no suspected Skeletons. (If unsolved, solve at the beginning of your end step.)

Solved — , Sacrifice this Case: Search your library for a card, put it into your hand, then shuffle. Activate only as a sorcery.

Enchant creature
Enchanted creature gets -2/-0 and can't block.

Enchant creature
When enchanted creature dies, draw three cards, then discard one of them.

Enchant land
Enchanted land has ": Target player loses 3 life."

Hideaway 5
At the beginning of your upkeep, you may mill three cards. Then if there are twenty or more cards in your graveyard, you may play the exiled card without paying its mana cost.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
, This Saga deals 2 damage to each opponent and you gain 2 life.
Create an X/X black Nightmare Horror creature token, where X is half your life total, rounded up. It deals X damage to you.

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

Flash
Replicate
Enchant creature
When enchanted creature dies, return it to the battlefield under your control.