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.

"As peace should be--gentle yet unstoppable."--Augustin IV

• Number: 6
• Rarity: U
• Power: 2
• Toughness: 1
• Type: Creature
• Subtype: Spirit
• Mana cost: 2W
• Color: White
• Artist: Justin Sweet