Deeproot Champion, Dragonsguard Elite are both rare cards but are worthless when compared to Electrostatic Pummeler (trample) and Sprite Dragon (flying, Haste) which cost the same mana but both have extra effects. I expect a rare to outperform a common and not be very subpar to it at the same cost . They should both only cost one mana similar to the common card Generous Visitor or Willow Geist but since they are rare shouldn't they have a secondary effect. Like Reach or Vigilance. I am just figuring that since they are rare this would fit better to the caliber of card it should be and make it a viable card in Historic. Then you could finish of the set with a two drop Blue Green Seahorsefly (Flying Vigilance) (appearance of a seahorse and horsefly combine) That has add a counter each time you cast a non creature spell.