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
Near Mint - $200
Lightly Played - $200
Moderately Played - $100
Heavily Played - $100
Damaged - $100
Near Mint Spanish - $200
Lightly Played Spanish - $200
Moderately Played Spanish - $100
Heavily Played Spanish - $100
Damaged Spanish - $100