Azorius Herald

Card Name: Azorius Herald
Card Color: W
Mana Cost: 2W
Type & Class: Creature – Spirit
P/T 2/1
Card Text:
Azorius Herald can’t be blocked. When Azorius Herald enters the battlefield, you gain 4 life. When Azorius Herald enters the battlefield, sacrifice it unless %U was spent to cast it.
Flavor Text: As peace should be