Double strike trigger for a Dreadhorde Arcanist effect is pretty cool. Trample would've been nice, but I don't thinks this is any better than Wildfire Devils. It's a bit more random since it randomly targets either you or your opponent, but having an ETB trigger and not having to rely on connecting to your opponent makes it the better card in my book.
I know it's a 4-drop and all, but golly what a trigger!
Low-power cube enthusiast!
My 1570 card cube (no longer updated)
My 415 Peasant+ Artifact and Enchantment Cube
Ever-Expanding "Just throw it in" cube.
My High Octane Unpowered Cube on CubeCobra