Favorable Winds

1U

Glacial Fortress

Siren Stormtamer

U

Hallowed Fountain

({T}: Add {W} or {U}.) As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Rally of Wings

Untap all creatures you control. Creatures you control with flying get +2/+2 until end of turn.

Dovin's Veto

This spell can't be countered. Counter target noncreature spell.

Hanged Executioner

Flying When Hanged Executioner enters the battlefield, create a 1/1 white Spirit creature token with flying. {3}{W}, Exile Hanged Executioner: Exile target creature.

Loyal Pegasus

Flying Loyal Pegasus can't attack or block alone.

Sephara, Sky's Blade

You may pay {W} and tap four untapped creatures you control with flying rather than pay this spell's mana cost. Flying, lifelink Other creatures you control with flying have indestructible. (Damage and effects that say "destroy" don't destroy them.)

Faerie Miscreant

Flying When Faerie Miscreant enters the battlefield, if you control another creature named Faerie Miscreant, draw a card.

Spectral Sailor

Flash (You may cast this spell any time you could cast an instant.) Flying {3}{U}: Draw a card.

Empyrean Eagle

Flying Other creatures you control with flying get +1/+1.

Plains

({T}: Add {W}.)

Island

({T}: Add {U}.)