Zariel, Asura of Order

Faction Leader (If this creature is your commander,
all creature types in the rules text of this card form
your faction. Replace any instances of your faction's creature types in the rules text of spells and abilities
you control with all members of your faction instead.
Ignore this ability when determining the characteristics of tokens you create.)
Flying, vigilance
When Zariel, Asura of Order attacks, fateseal X,
where X is the number of Angel, Soldier, Knight,
and Cleric creatures you co