Flagstones of Trokair

: Add .
When Flagstones of Trokair is put into a graveyard from the battlefield, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle your library.

Rubinia Soulsinger

You may choose not to untap Rubinia Soulsinger during your untap step.
: Gain control of target creature for as long as you control Rubinia and Rubinia remains tapped.

Miren, the Moaning Well

: Add .
, , Sacrifice a creature: You gain life equal to the sacrificed creature’s toughness.

Exalted Angel

Flying
Whenever Exalted Angel deals damage, you gain that much life.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Squadron Hawk

Flying
When Squadron Hawk enters the battlefield, you may search your library for up to three cards named Squadron Hawk, reveal them, put them into your hand, then shuffle your library.

Leyline of the Void

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent’s graveyard from anywhere, exile it instead.

Nantuko Monastery

: Add .
Threshold — : Nantuko Monastery becomes a 4/4 green and white Insect Monk creature with first strike until end of turn. It’s still a land. Activate this ability only if seven or more cards are in your graveyard.

Gravity Well

Whenever a creature with flying attacks, it loses flying until end of turn.

Guard Gomazoa

Defender, flying
Prevent all combat damage that would be dealt to Guard Gomazoa.