JUNDerwhelming - a post-M13 Jund idea.
Some notes:
Varolz: Good way out of stalling, has synergy with Bloodrush.
Mana fixing: no checklands, farseeks, or arbor elves. This is not good. Manaweft Sliver is not good enough, but the deck seems like it'll struggle without an early mana fixer.
Riot Piker: Obviously a weird choice, but the first strike is surprisingly effective, and with lots of Bloodrush (including deathtouch bloodrush) he's not going to be losing many fights. The forced attack makes it difficult for the opponent to foresee a Bloodrush.
Ruric Thar: Worth a try, but some ramp would be handy.
Child of Night: if we need life, this is easy to cast and good to Bloodrush/Scavenge.
Planeswalker removal - Dreadbore, or a well-timed Bloodrush.
Enchantment/Artifact removal: Putrefy, and Golgari Charm - advantageous in that they double up as other reasonable effects.
Slaughter Games: Could be worth a try!
Regathan Firecat: Could be a sideboard card, if we're not playing against red and there's no graveyard hate, this can be a nasty trampler with Ghor-Clan, and a nice +4/+4 Scavenge for 3 mana.