Coral Atoll

This land enters tapped.
When this land enters, sacrifice it unless you return an untapped Island you control to its owner's hand.
{T}: Add {C}{U}.

Murkwater Pathway

This land enters tapped unless you have two or more opponents.
{T}: Add {U} or {B}.

This land enters tapped.
When this land enters, sacrifice it unless you return an untapped Swamp you control to its owner's hand.
{T}: Add {C}{B}.

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {U}{B}.

{T}: Add {C}.
{U/B}, {T}: Add {U}{U}, {U}{B}, or {B}{B}.

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}.

This land enters tapped.
{T}, Sacrifice this land: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

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

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

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

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

{T}: Add {U}.
{T}: Add {B}. Activate only if you control an Island or a Swamp.

{T}, Pay 1 life, Sacrifice this land: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

{T}: Add {C}.
{T}: Add {U} or {B}. Activate only if you control a Swamp.

({T}: Add {U} or {B}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.