Plains

Sol Ring

Mountain

Arcane Signet

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

Forest

Island

Rukarumel, Biologist

As Rukarumel enters, choose a creature type.
Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.
{3}, {T}: Create a 1/1 colorless Sliver creature token.

Mox Amber

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.