Autumn watches the thing fly in with resolve on her wooden face, knowing that eventually she would have to face a dragon. She taps Dino with the wand to apply some healing, and
Entourage:
Bertha (5N80E): Hold and wait for something it can do.
Boris (15N80E): Hold and wait for something it can do.
Aria (10N90E40Z): Fly to 30N80E40Z and Zap the dragon.
(Summoning: Bertha appeared on 561, Boris on 560, Aria on 559)
Dino is healed up to 312 HP.
Dino does not move from 25N80E, because he has no quarrel with the dragon. It has harmed neither him nor his good friend Autumn. Autumn will have to move somewhere else, anywhere from 35-45N75E.
Aria zaps the dragon for 10 points of electrical damage.
Round 565
The dragon starts hovering, then breathes a wave of crushing force. Autumn (Ref save 12), Dino (Ref save 24), and Greyshadow (Ref save 17) all take 68 points of force damage.

Autumn is dead and Greyshadow is dying. Dino has 244 HP remaining.
Now Dino has a reason to attack the dragon. He lumbers over to 40N80E and smacks the dragon with his tail (rolled 44) for 33-20=13 points of damage. The dragon is not stunned thanks to his Great Fortitude feat (rolled 29 Fort save), but is down to 327 HP.
Next in round 565 for Neutral Good is a cloud giant (
Monster Manual).