Training Center

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

Shivan Reef

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

({T}: Add {U} or {R}.)
This land enters tapped.

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

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

{T}, Pay 1 life: Add {U} or {R}.
{1}, {T}, Sacrifice this land: Draw a card.

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

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

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