Its easy to draw two or three cards a turn while dealing massive damage, which is exactly where an aggressive deck wants to be
(You may put the top two cards of your library into your graveyard.) Fathomless descent Enchanted permanent gets -X/-0, where X is the number of permanent cards in your graveyard
The ones in Zendikar Rising are modal double-faced cards
Then she has a hasted 1/5 body for just three mana with the ability to tap with three and then have her fight one of yours with another dork, and if you fight yours, it's just one mana to fight
Luckily we have tons of spicy tribal card draw options: we can draw cards through combat damage with Yuriko, the Tiger's Shadow, tap to draw cards with Sea Gate Loremaster, or draw cards on our upkeep with Graveborn Muse
If you choose something like Sphinx Summoner, Sharuum, Birthing Pod, or Duplicant, youll at least get something for your efforts unless it gets countered