Thought Vessel

You have no maximum hand size.
{T}: Add {C}.

Hero's Downfall

Soul Shatter

Each opponent sacrifices a creature or planeswalker with the highest mana value among creatures and planeswalkers they control.

Dutiful Return

Return up to two target creature cards from your graveyard to your hand.

Damnation

Destroy all creatures. They can't be regenerated.

Murder

Recover

Return target creature card from your graveyard to your hand.
Draw a card.

Forever Young

Put any number of target creature cards from your graveyard on top of your library.
Draw a card.

Swamp

Feed the Cycle

As an additional cost to cast this spell, forage or pay {B}. (To forage, exile three cards from your graveyard or sacrifice a Food.)
Destroy target creature or planeswalker.

Cabal Coffers

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

Eat to Extinction

Exile target creature or planeswalker. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Urborg Uprising

Return up to two target creature cards from your graveyard to your hand.
Draw a card.

Death Denied

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

Gravepurge

Gilded Lotus

Sol Ring

Soul Salvage

Sheoldred, the Apocalypse

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

Wander in Death

Return up to two target creature cards from your graveyard to your hand.
Cycling {2} ({2}, Discard this card: Draw a card.)

Decree of Pain

Destroy all creatures. They can't be regenerated. Draw a card for each creature destroyed this way.
Cycling {3}{B}{B} ({3}{B}{B}, Discard this card: Draw a card.)
When you cycle Decree of Pain, all creatures get -2/-2 until end of turn.

Unholy Hunger

Destroy target creature.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you gain 2 life.

Temple of the False God

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

Echoing Return

Return target creature card and all other cards with the same name as that card from your graveyard to your hand.

Relentless Rats

Relentless Rats gets +1/+1 for each other creature on the battlefield named Relentless Rats.
A deck can have any number of cards named Relentless Rats.