Serra Angel

Youthful Valkyrie

Flying
Whenever another Angel enters the battlefield under your control, put a +1/+1 counter on Youthful Valkyrie.

Plains

Seraph of Dawn

Angel of Vitality

Flying
If you would gain life, you gain that much life plus 1 instead.
Angel of Vitality gets +2/+2 as long as you have 25 or more life.

Giada, Font of Hope

Flying, vigilance
Each other Angel you control enters the battlefield with an additional +1/+1 counter on it for each Angel you already control.
{T}: Add {W}. Spend this mana only to cast an Angel spell.

Sunblade Angel

Flying, first strike, vigilance, lifelink

Swords to Plowshares

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

Marble Diamond

Marble Diamond enters the battlefield tapped.
{T}: Add {W}.

Bond of Discipline

Tap all creatures your opponents control. Creatures you control gain lifelink until end of turn.

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

Generous Gift

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

Gods Willing

Target creature you control gains protection from the color of your choice until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything of that color.)
Scry 1.