Azorius Herald
Creature — Spirit
This creature can't be blocked.
When this creature enters, you gain 4 life.
When this creature enters, sacrifice it unless 
was spent to cast it.
"As peace should be—gentle yet unstoppable." —Augustin IV
Justin Sweet
Dissension (DIS)
• #2Rulings
If this enters in a way other than announcing it as a spell, then the appropriate mana can't have been paid, and you'll have to sacrifice it.
(wotc • 2006-05-01)
Rulings
If this enters in a way other than announcing it as a spell, then the appropriate mana can't have been paid, and you'll have to sacrifice it.
(wotc • 2006-05-01)