Flooded Strand

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.

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

{T}: Add one mana of any type that a land you control could produce.

{T}, Pay 1 life: Add one mana of any color.

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

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

({T}: Add {G} or {U}.)
As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.