I would call my summoner the Little Kickback and would be an earth splinter. It's abilities would be backfire and phase and would cost 5 mana. As green has a bit low magic def it increases the utility of the cards a bit, but as they are low on flying and evasion monsters this wouldn't overpower them. The card also favors the new reward cards like Pelacor Mercenary from the earth splinter and from the neutral cards Gargoya Lion and Gargoya Devil.