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Flying
Whenever Herald of War attacks, put a +1/+1 counter on it.
Angel spells and Human spells you cast cost {1} less to cast for each +1/+1 counter on Herald of War.
A creature spell that's both an Angel and a Human will cost {1} less to cast for each +1/+1 counter on Herald of War.
If there are additional costs to cast a creature spell, such as a kicker cost, apply those increases before applying cost reductions.
The +1/+1 counter is put on Herald of War before blockers are declared and combat damage is dealt.
The cost reduction is based on the total number of +1/+1 counters on Herald of War, not just the ones put on it by its own ability.
