I have two friends who play as the Druid and Cleric and they both have summoning powers. We got confused as to whether the summoned creatures (such as a guardian drake) can be targeted by monsters or enemies because the power doesn't say anywhere that they have hit points or what their AC is. Animal companions do have ht points and AC listed, which makes me think summons don't have them on purpose.
Do these summoned creatures just stay on the field for the entire encounter or can they somehow be dissipated when a creature hits them?