Mountain

Forest

Mox Amber

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

Plains

Sol Ring

Island

Arcane Signet

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

Swamp

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.

Have

Getting

Don't Have

Sliver?? I hardly know her!!