Sky Diamond

Star Compass

Star Compass enters tapped.
{T}: Add one mana of any color that a basic land you control could produce.

Firemind Vessel

Firemind Vessel enters tapped.
{T}: Add two mana of different colors.

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Thought Vessel

You have no maximum hand size.
{T}: Add {C}.

Arcane Signet

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

Sol Ring

Fire Diamond

Fire Diamond enters tapped.
{T}: Add {R}.

Coldsteel Heart

Coldsteel Heart enters tapped.
As Coldsteel Heart enters, choose a color.
{T}: Add one mana of the chosen color.

Izzet Signet

Rielle, the Everwise

Rielle, the Everwise gets +1/+0 for each instant and sorcery card in your graveyard.
Whenever you discard one or more cards for the first time each turn, draw that many cards.