The "Levelers' Glory" deck features the level up ability, which allows creatures to transform and grow over the course of the game. For example, Caravan Escort and Student of Warfare are both 1/1 creatures that cost . However, after leveling up a few times, Caravan Escort can become a 5/5 creature with first strike, and Student of Warfare becomes a 4/4 creature with double strike! The level up ability doesn't just focus on battle prowess however. Consider Hedron-Field Purists, which at level 5 prevents 2 damage that any source would deal to you or your creatures. Leveling it up quickly is a great way to protect your other creatures.
Your opponent will certainly have creatures as well, but you have the tools to deal with them. Unsummon and Fleeting Distraction can stall or blunt opposing attacks. Narcolepsy can put a creature to sleep permanently, or if that's not good enough, get the entire opposing army dozing with Sleep. Control a smaller creature with Domestication and use it against your opponent. With these weapons at your disposal, you'll have no trouble keeping your opponent out of your hair long enough for your creatures to lead you to victory.
Many other Rise of the Eldrazi cards can help the "Levelers' Glory" deck. First, look for more creatures with level up, like Ikiral Outrider, Knight of Cliffhaven, and Skywatcher Adept. Any of these will make your deck stronger. Try using them and your other "levelers" with Time of Heroes, an enchantment that gives each creature you control with a level counter on it +2/+2. Finally, Transcendent Master is perhaps the most fearsome leveler of all, growing eventually to 9/9, gaining lifelink, and becoming indestructible!