The summon natural ally power states that you can summon a creature associated with your primal aspect (Primal Guardian or Primal Predator). The call to the wild feat lets you replace a daily power with summon natural ally. So how does this work with the Primal Swarm aspect? Is there a seperate set of usable summons for swarm druids? Do they use the Primal Guardian set because of common CON focus? Or are they unable to use summon natural ally due to a lack of assaciated creatures?