Basal Sliver

All Slivers have "Sacrifice this permanent: Add {B}{B}."

Gixian Infiltrator

Whenever you sacrifice another permanent, put a +1/+1 counter on this creature.

Swamp

Deadly Dispute

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Cast Down

Corrupted Conviction

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

Village Rites

Defile

Target creature gets -1/-1 until end of turn for each Swamp you control.

Universal Automaton

Changeling (This card is every creature type.)

Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Mortician Beetle

Whenever a player sacrifices a creature, you may put a +1/+1 counter on this creature.

Mindlash Sliver

All Slivers have "{1}, Sacrifice this permanent: Each player discards a card."

Unearth

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling {2} ({2}, Discard this card: Draw a card.)

Metallic Sliver

Bojuka Bog

This land enters tapped.
When this land enters, exile target player's graveyard.
{T}: Add {B}.