The "Eldrazi Arisen" deck puts you in command of the Eldrazi, an ancient race of behemoths that has awoken and begun to terrorize the inhabitants of Zendikar. The stars of your deck are Ulamog's Crusher, Hand of Emrakul, and Pathrazer of Ulamog. Each of these Eldrazi creatures is 7/7 or larger, and all have the annihilator ability that forces an opponent to sacrifice a number of permanents every time you attack with them. Your goal is to cast them as quickly as possible and then ride them to victory.
With creatures as impressive as the Eldrazi, you won't need much help once they're on the battlefield. However, you'll need to find enough mana to cast them, and many of your cards help you do that. Nest Invader, Kozilek's Predator, Rapacious One, and Awakening Zone create Eldrazi Spawn creature tokens, which can be sacrificed add to your mana pool. Growth Spasm and Ondu Giant put lands from your library onto the battlefield. Dreamstone Hedron can add to your mana pool or can be sacrificed for three cards, whichever the situation calls for. Despite their hefty costs, the Eldrazi should be well within reach.
You can improve the "Eldrazi Arisen" deck with cards from Rise of the Eldrazi booster packs. The easiest way is to add even more huge Eldrazi creatures like Artisan of Kozilek, a 10/9 creature with annihilator 2 that returns a creature from your graveyard to the battlefield when you cast it. It That Betrays also has annihilator 2 and puts cards sacrificed by your opponents (like those sacrificed to the annihilator ability) onto the battlefield under your control. And the most terrifying of all the Eldrazi is Emrakul, the Aeons Torn. Emrakul is 15/15, has annihilator 6, and gives you an extra turn when you cast it!