Mortician Beetle

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

Forest

Child of Thorns

Sacrifice this creature: Target creature gets +1/+1 until end of turn.

Commune with Nature

Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Foul Spirit

Flying
When this creature enters, sacrifice a land.

Abyssal Gatekeeper

When this creature dies, each player sacrifices a creature of their choice.

Death Cultist

Sacrifice this creature: Target player loses 1 life and you gain 1 life.

Fume Spitter

Sacrifice this creature: Put a -1/-1 counter on target creature.

Thrull Retainer

Enchant creature
Enchanted creature gets +1/+1.
Sacrifice this Aura: Regenerate enchanted creature.

Costly Plunder

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

Ranger's Guile

Target creature you control gets +1/+1 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

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.)

Grisly Salvage

Reveal the top five cards of your library. You may put a creature or land card from among them into your hand. Put the rest into your graveyard.

Briar Shield

Enchant creature
Enchanted creature gets +1/+1.
Sacrifice this Aura: Enchanted creature gets +3/+3 until end of turn.

Perilous Myr

When this creature dies, it deals 2 damage to any target.

Swamp

Vulturous Aven

Flying
Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, you draw two cards and you lose 2 life.

Vessel of Nascency

{1}{G}, Sacrifice this enchantment: Reveal the top four cards of your library. You may put an artifact, creature, enchantment, land, or planeswalker card from among them into your hand. Put the rest into your graveyard.

Timberland Ruins

This land enters tapped.
{T}: Add {G}.
{T}, Sacrifice this land: Add one mana of any color.

Bloodbriar

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

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Bog Wreckage

This land enters tapped.
{T}: Add {B}.
{T}, Sacrifice this land: Add one mana of any color.