Mountain

Plains

Marble Diamond enters tapped.
{T}: Add {W}.

{2}, {T}, Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

Fire Diamond enters tapped.
{T}: Add {R}.

{T}: Add {C}{C}.
{2}, {T}, Sacrifice this artifact: Draw two cards.