Clifftop Retreat

Clifftop Retreat enters tapped unless you control a Mountain or a Plains.
{T}: Add {R} or {W}.

Spectator Seating

Spectator Seating enters tapped unless you have two or more opponents.
{T}: Add {R} or {W}.

Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

Whenever you cast a noncreature spell, draw a card.

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

Draw three cards, then put two cards from your hand on top of your library in any order.

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

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

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

Flying
Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying.
Sacrifice a Spirit: Add {R}.

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