This deck is a novelty and is not in any way competitive. The point of it is to exploit a combo I found to get infinite Warcry on a unit. Incidentally, this will also get you unlimited life and draw your entire deck.
The basis of the combo is the fact that you can make Battlefield Scavenger a Valkyrie with Counterfeiter, so you can use one Scavenger to bring back another. Beyond this you just need tools to lower the ability and play costs enough and get some power back each time you do it.
1. Play two Stoneshakers while there are at least two Battlefield Scavengers in your deck, to get their costs down to 0. You can use Meditation to put them back in the deck before playing the Stoneshakers.
2. Play a Valkyrie.
3. Play Counterfeiter and target the Valkyrie to make everything Valkyries.
4. Play two Merriest Mandrakes.
5. Play two zero-cost Battlefield Scavengers.
6. Play Brenn from the market.
7. Fill up your board.
8. Hold a Lumen Reclaimer in your hand.
9. Kill one of the Battlefield Scavengers, by playing a 13th unit or otherwise.
10. Use the second Scavenger to draw the first from your void. This will cost one with the two Merriest Mandrakes in play.
11. Play the drawn Scavenger for free, killing the other Scavenger to make room. Brenn gives you a power back when it is played.
12. Repeat steps 10 and 11 until you get tired of clicking.
13. If you don't feel like losing the game immediately due to decking, play the Lumen Reclaimer and shuffle your void into your deck.
14. Enjoy your Warcry 100 unit and your 999 life!