{Yeva, natures herald} + {primal force Mage} + {gruul rage beast}
Or
{guild fued} + {primal forcemage}
Not so sure about the first one, flashy fighting is neat and all but the force age and guild feud combo made me smile.
Also consider: {Massacre Wurm}, {Acidic Slime}, {Inferno Titan}, {Hearthcage Giant} as pulls for the feud, and maybe {Purphoros, God of the Forge} too?
The wurm is an epic pull for board wipe vs aggro decks, the slime is almost guaranteed to kill what it fights and lets you destroy some non-creature stuff as a bonus, and the Titan and the hearthcage deal dire t damage on etb as well as being big enough to take care of themselves!