Flying, vigilance Each other Angel you control enters with an additional +1/+1 counter on it for each Angel you already control. : Add . Spend this mana only to cast an Angel spell.
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Giada, Font of Hope
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Legendary Creature — Angel
Flying, vigilance Each other Angel you control enters with an additional +1/+1 counter on it for each Angel you already control. : Add . Spend this mana only to cast an Angel spell.
原文"Each Angel you already control" means each Angel you control other than the Angel entering the battlefield, including Giada. It doesn't matter if some or all of the Angels on the battlefield entered the battlefield after Giada did.