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.
This artifact enters tapped.
{T}: Add {R} or {G}.

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.)

Crack the Earth

Each player sacrifices a permanent of their choice.

Forest

Gone

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

Dead

Dead // Gone

Tremble

Each player sacrifices a land of their choice.

Raze

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

Werebear

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

Cathartic Reunion

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

Hooting Mandrills

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

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.
This artifact enters tapped.
{T}: Add {B} or {R}.

Harvest Wurm

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