Sultai Scavenger

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Flying

Writhing Necromass

This spell costs {1} less to cast for each creature card in your graveyard.
Deathtouch

Snow-Covered Mountain

Snow-Covered Swamp

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Blood Pet

Sulfurous Mire

({T}: Add {B} or {R}.)
Sulfurous Mire enters tapped.

Bone Picker

This spell costs {3} less to cast if a creature died this turn.
Flying, deathtouch

Village Rites

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

Reckoner's Bargain

As an additional cost to cast this spell, sacrifice an artifact or creature.
You gain life equal to the sacrificed permanent's mana value. Draw two cards.

Fume Spitter

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

Skred

Skred deals damage to target creature equal to the number of snow permanents you control.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.