Sulfur Vent

This land enters tapped.
{T}: Add {B}.
{T}, Sacrifice this land: Add {U}{R}.

Wild Cantor

({R/G} can be paid with either {R} or {G}.)
Sacrifice this creature: Add one mana of any color.

Mountain

Manamorphose

Add two mana in any combination of colors.
Draw a card.

Flux

Each player discards any number of cards, then draws that many cards.
Draw a card.

Skirge Familiar

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}.

Exhume

Each player puts a creature card from their graveyard onto the battlefield.

Island

Entropic Eidolon

{B}, Sacrifice this creature: Target player loses 1 life and you gain 1 life.
Whenever you cast a multicolored spell, you may return this card from your graveyard to your hand.

Mistvein 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 {U} or {B}.

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.)

Verdant Eidolon

{G}, Sacrifice this creature: Add three mana of any one color.
Whenever you cast a multicolored spell, you may return this card from your graveyard to your hand.

Tortured Existence

{B}, Discard a creature card: Return target creature card from your graveyard to your hand.

Swamp

Enigma Eidolon

{U}, Sacrifice this creature: Target player mills three cards.
Whenever you cast a multicolored spell, you may return this card from your graveyard to your hand.