Akroma, Angel of Wrath

Flying, first strike, vigilance, trample, haste, protection from black and from red

Asha's Favor

Enchant creature
Enchanted creature has flying, first strike, and vigilance.

Attended Knight

First strike
When Attended Knight enters, create a 1/1 white Soldier creature token.

Always Watching

Nontoken creatures you control get +1/+1 and have vigilance.

Aerial Maneuver

Target creature gets +1/+1 and gains flying and first strike until end of turn.

Abbey Griffin

Battlefield Raptor

Kitesail Scout

Aerial Responder

Aven Sunstriker

Flying
Double strike (This creature deals both first-strike and regular combat damage.)
Megamorph {4}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Odric, Master Tactician

First strike (This creature deals combat damage before creatures without first strike.)
Whenever Odric, Master Tactician and at least three other creatures attack, you choose which creatures block this combat and how those creatures block.

Baneslayer Angel

Flying, first strike, lifelink, protection from Demons and from Dragons

Odric, Lunarch Marshal

At the beginning of each combat, creatures you control gain first strike until end of turn if a creature you control has first strike. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, skulk, trample, and vigilance.

Akroma, Vision of Ixidor

Flying, first strike, vigilance, trample
At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner.
Partner

Scout's Warning

The next creature card you play this turn can be played as though it had flash.
Draw a card.