Praxis Outlaw is a Unit.
How to Get Edit
Beat the first mission in Jekk's Bounty, "Rogues and Ruffians".
Play this in a deck that can empty its hand really quickly, either an aggressive deck with a low curve, or a deck that discards its cards using a card like Feln Cauldron and could use the extra cards.
It can also be used to counter Control decks that discard your hand with cards like Azindel's Gift. The discard occurs before Praxis Outlaw's effect activates.
If aggressive decks do run this card, they run it as a 1 of to give them a bit of extra steam and to decrease the chances of drawing it earlier in the game.
Only one Praxis Outlaw will be drawn from your deck if your hand is empty at the end of your turn.
Praxis Outlaw appears to trigger the last out of "End of Turn" effects, as it will trigger after Azindel's Gift.