Prairie Stream

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

Flooded Strand

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

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

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

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

As Port Town enters, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters tapped.
{T}: Add {W} or {U}.

{T}: Add {C}.
{T}: Add {W}. Activate only if you control an Island.
{T}: Add {U}. Activate only if you control a Plains.

Destroy target nonland permanent. Its controller creates a 1/1 white Human creature token.

Exile target creature. Its controller gains life equal to its power.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.