Ehem, time to give my two cents:
Otyugh, a name that brings fear to many, one that is mastered by few. The perfect form of Creature Control, able to tear down any material creatures that have less HP than it, which is not many. Once it starts nomming away, however, it can become almost unstoppable. Don't ask me how eating has to due with Gravity, but it is the main card (besides Momentum, maybe) that makes Gravity stand out as an element. Without it, we'd be stuck to Honey Charger rushes, but now, we have a backup that helps Mono Gravity's slowness not be as much of a factor. Just pair it up with Gravity Shield and start chowing down on the creatures with under 6 HP. This isn't the second-most used upgraded card for nothing...