I've been fiddling with GR Stompy. It has had some success on Modo, largely because Blood Moon is a disruptive card.
Basically the premise is this:
play aggro idiots
moon their mana base
continue to beat face until dead
Most aggro deck are worse than affinity or burn or not disruptive enough to validate their existence. Humans, for example, is disruptive and maintains a quick clock. A deck like this hopes to do the same.
Magus and Moon do the same thing but you want to split the difference, especially if people are playing Slagstorm variants.
This deck floods easily, which is why we're fairly top heavy for 21 lands.