Harvest Wurm

When Harvest Wurm enters, sacrifice it unless you return a basic land card from your graveyard to your hand.

Active Volcano

Choose one —
• Destroy target blue permanent.
• Return target Island to its owner's hand.

Firewild Borderpost

You may pay {1} and return a basic land you control to its owner's hand rather than pay this spell's mana cost.
Firewild Borderpost enters tapped.
{T}: Add {R} or {G}.

Tremble

Forest

Ancient Grudge

Destroy target artifact.
Flashback {G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Electrickery

Electrickery deals 1 damage to target creature you don't control.
Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Akki Blizzard-Herder

When Akki Blizzard-Herder dies, each player sacrifices a land.

Crack the Earth

Veinfire Borderpost

You may pay {1} and return a basic land you control to its owner's hand rather than pay this spell's mana cost.
Veinfire Borderpost enters tapped.
{T}: Add {B} or {R}.

Mountain

Raze

As an additional cost to cast this spell, sacrifice a land.
Destroy target land.

Werebear

{T}: Add {G}.
Threshold — Werebear gets +3/+3 as long as seven or more cards are in your graveyard.

Serene Heart

Cathartic Reunion

As an additional cost to cast this spell, discard two cards.
Draw three cards.

Gone

Return target creature you don't control to its owner's hand.

Dead

Dead // Gone

Swirling Sandstorm

Threshold — Swirling Sandstorm deals 5 damage to each creature without flying if seven or more cards are in your graveyard.

Flame Slash

Flame Slash deals 4 damage to target creature.

Faithless Looting

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)