Terramorphic Expanse

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Skycloud Expanse

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

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

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

This land enters tapped.
{T}: Add {U}, {R}, or {W}.

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

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

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

{T}: Add {C}.
{2}, {T}, Sacrifice this land: Draw a card if you control an artifact. Draw a card if you control an enchantment.