The card bearing this art.

The card bearing this text: "Whenever a player casts a spell, that player may pay 1..."

The mana cost of Swords to Plowshares.

The name of the combination of Blue and White on Ravnica.

"This creature cannot be blocked except by creatures with flying and reach"

The card bearing this art.

The card bearing this text: "...pay 1 life and exile a blue card from your hand..."

The mana cost of Prossh, Skyraider of Kher.

The combination of Red, Blue, and Green on Tarkir.

"Your creatures can help cast this spell. Each creature tapped while paying this spell's mana cost counts for 1 or one mana of that creature's color"

The card bearing this art.

The card bearing this text: "Pay 7 life: Draw seven cards"

The mana cost of Force of Will.

The combination of Orzhov and Golgari on Tarkir.

"Whenever you would draw a card and this card is in your graveyard, you may instead mill X cards. If you do, return this card to your hand"

The card bearing this art.

The card bearing this text: "Pay 50 life..."

The mana cost of Griselbrand.

The combination of Orzhov and Azorius on Alara.

"This creature can't be dealt damage, enchanted, equipped, blocked, or targeted by anything that is X"

The card bearing this art.

The card bearing this text: "...that player skips that draw and you draw a card."

The mana cost of Omniscience.

A deck in Standard recently was called Dark Jeskai for it's multicolored nature. This color was not included.

"Whenever this creature attacks, defending player sacrifices X permanents"