Foreboding Ruins

As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped.
{T}: Add {B} or {R}.

Thriving Moor

This land enters tapped. As it enters, choose a color other than black.
{T}: Add {B} or one mana of the chosen color.

As this land enters, you may reveal an Island or Swamp card from your hand. If you don't, this land enters tapped.
{T}: Add {U} or {B}.

{T}: Add {C}.
{T}: Add {U} or {R}. This land deals 1 damage to you.

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

{T}: Add {C}.
{T}: Add {U} or {B}. This land deals 1 damage to you.

This land enters tapped. As it enters, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.

({T}: Add {U} or {B}.)
This land enters tapped unless you control two or more basic lands.

This land enters tapped unless you control a Swamp or a Mountain.
{T}: Add {B} or {R}.

This land enters tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.

This land enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.

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

({T}: Add {B} or {R}.)
This land enters tapped unless you control two or more basic lands.

{T}: Add {C}.
{T}: Add {B} or {R}. This land deals 1 damage to you.

This land enters tapped. As it enters, choose a color other than red.
{T}: Add {R} or one mana of the chosen color.