Commander's Sphere

{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

Wayfarer's Bauble

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

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

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

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

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

{T}: Add {C}.
{T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.