MTG

Hall of Gemstone

{1}

{G}

{G}

World Enchantment

At

the

beginning

of

each

player's

upkeep,

that

player

chooses

a

color.

Until

end

of

turn,

lands

tapped

for

mana

produce

mana

of

the

chosen

color

instead

of

any

other

color.

Hall of Gemstone

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