Marble Diamond

This artifact enters tapped.
{T}: Add {W}.

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Green spells you cast cost {1} less to cast.

White spells you cast cost {1} less to cast.

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

{T}: Add {C}.
{T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.

{T}: Add {C}.
{1}, {T}, Sacrifice this artifact: Draw a card.