Mountain

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Swamp

The Ur-Dragon

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

Forest

Island

Plains

Exotic Orchard

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

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