Rules FAQ
When a card’s ability text refers to its own title, it is referring to itself only, and not to other copies (by title) of the card. So if you have two Bastard Daughters in play, and one is killed, you trigger the reaction one time and your opponent discards one card.
Self-Referential Text When a card’s ability text refers to its own title, it is referring to itself only, and not to other copies (by title) of the card. Related: Copy
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Duckbringer
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