Add {B}{B}{B}.

Prevent all combat damage that would be dealt this turn.

Return X target creature cards from your graveyard to your hand.

You gain life equal to the damage dealt to you this turn. Simulacrum deals damage to target creature you control equal to the damage dealt to you this turn.

Add {B} for each creature card in your graveyard.

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: This artifact deals 50 damage to any target.

Black creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

You may play lands from your graveyard.

Prevent all combat damage that would be dealt to attacking creatures you control.

Spells your opponents cast cost {2} more to cast. At the beginning of your end step, each opponent loses 1 life.

Nyx Lotus enters tapped. {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

{T}: Add {C}{C}.

At the beginning of your upkeep, draw a card. {T}: This artifact deals 1 damage to any target.

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

{T}: Add {C}. {3}, {T}: Add {B} for each basic Swamp you control.

{T}: Add one mana of any color in your commander's color identity.

This land enters tapped. {T}: Add {B}. {2}, {T}: Add {B} for each black creature card in your graveyard.

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

({T}: Add {B}.)

{T}: Add {C}. {T}: Regenerate target Insect, Rat, Spider, or Squirrel. (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

{T}: Add {C}{C}. Activate only if you control five or more lands.

Each land is a Swamp in addition to its other land types.

When this creature enters, each opponent discards a card.

Whenever this creature attacks or blocks, any player may exile a card from their graveyard. If a player does, this creature assigns no combat damage this turn.

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

Each opponent's maximum hand size is reduced by one.

Whenever another Rat you control enters, exile up to one target card from an opponent's graveyard. At the beginning of combat on your turn, create a 1/1 black Rat creature token with "This token can't block."

Rat offering (You may cast this spell any time you could cast an instant by sacrificing a Rat and paying the difference in mana costs between this and the sacrificed Rat. Mana cost includes color.) Whenever a permanent is put into an opponent's graveyard, that player loses 1 life.

Rats you control have menace. {1}{B}, {T}: Create a 1/1 black Rat creature token. {2}{B}{B}, {T}, Sacrifice three Rats: Gain control of target creature.

Skulk (This creature can't be blocked by creatures with greater power.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

This creature gets +1/+0 for each other Rat you control. A deck can have any number of cards named Rat Colony.

When this creature enters, target opponent discards a card.

Deathtouch When this creature dies, exile target card from an opponent's graveyard.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature of their choice.

Shadow (This creature can block or be blocked by only creatures with shadow.) Whenever this creature deals combat damage to a player, each player discards a card.

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

Destroy all creatures. They can't be regenerated.

Spend only black mana on X. Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Each opponent loses X life. You gain life equal to the life lost this way.

Each opponent loses 1 life for each creature you control.

Starting with you, each player may pay any amount of life. Repeat this process until no one pays life. Each player creates a 1/1 black Rat creature token for each 1 life they paid this way.

Put all creature cards from all graveyards onto the battlefield under your control.

Black creatures get +1/+1.

Flash Whenever a creature you control dies, each opponent sacrifices a creature of their choice.

Sacrifice this enchantment: Return to your hand all creature cards in your graveyard that were put there from the battlefield this turn.