I was wondering whether I could create an infinite loop using [Fell Specter](http://gatherer.wizards.com/Pages/Search/Default.aspx?name=%2b%5bFell%20Specter%5d) and a card with an ability similar to or exactly like this one:

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> Whenever an opponent loses life, that player discards a card.
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Does anyone know of such a card? Thank you in advance for the help!