To me Body Count feels like fixed version of Lilianas Standard Bearer and if youre already on the aristocrat, extort, lifedrain or sacrifice gameplan, being able to draw cards at instant speed for 1 mana is quite high value
For example, if it's discarded, countered, or destroyed, put it into your graveyard
Then the spell's controller may choose new targets for it
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Even for the baseline ability, nabbing a single extra card per turn for a minor loss of life is usually worth the trade-off, and seeing as the Confidant is usually a removal magnet early, you likely wont have to worry too much about slipping into the danger zone
However, you can only attack a player (or planeswalker)