How do you kill a summoned phoenix?

Thanks for the answers, but I'm not playing as Necropolis or Inferno; I'm playing as Haven. I don't think it makes sense to focus on Elemental skills, but the idea about crossbows is good. I just need to figure out how to lure out that Phoenix, and I can cast Phantom. So, the tactic is this: as soon as the opponent summons the Phoenix, I move all my troops back to the starting position, forcing the opponent to attack, because my archers are much stronger than the Necropolis ones. Maybe someone else can suggest something? And regarding Blind, I'll cast it, but the opponent will dispel it with a spell or use Antimagic, plus I'm playing against a mage, and magic is well-developed there.