I did run this in my release day FNM winning draft, and really smashed them good and strong with her
Killing them is useful, but another strategy is to be patient
Entering the battlefield with four loyalty, Sarkhan's +1 adds one mana of any color to its owner's mana pool whilst drawing its controller a card
The value of this card goes up the higher power the table, when you can expect more interaction
3 Chaos, the Endless Cloud of Darkness Cloudbound Moogle Delivery Moogle Dion, Bahamut's Dominant Dragoon's Wyvern Esper Terra Freya Crescent Gaelicat Il Mheg Pixie Kain, Traitorous Dragoon Kefka, Ruler of Ruin Phoenix, Warden of Fire PuPu UFO Rook Turret Rosa, Resolute White Mage Sephiroth, One-Winged Angel Shinryu, Transcendent Rival Sin, Spira's Punishment Summon: Alexander Summon: Bahamut Summon: Primal Garuda Ultima, Origin of Oblivion Valkyrie Aerial Unit
There are also cards like Presence of Gond that allow you to safely tap Emmara while doubling up on the number of tokens it makes