Spiny concentrates and a ball of flame appears in his hand. He throws it at Shedrach and hits him in the tongue! (Rolled natural 20, 18 touch crit roll) Shedrach takes 18-5=13 points of damage! He has 82 hp left.
Spiny throws another ball of flame and it lands in the exact same spot! (Rolled natural 20, 18 touch crit roll) 17-5=12 points of damage. Shedrach has 70 hp left.
Sheddy and the Jets will continue following it around, lamely hoping it will come into range for a nice hug. Failing that, if the critter runs out of ranged attacks and still won't come close it's draw time.
24 rounds later, the shed has taken 78 points of damage and is a burning mess. Spiny never ran out of ranged attacks and we'll assume his position is 60N15E40Z, flying south.
Next in round 443: an assassin jelly (Wotc website) (See, I told you!)
AJ galoshes to 70n 35e, and once he gets there he glops a bt to try and attrack the flying thing's attention in the hope of drawing it down to floor level. (Ready attack if it comes into range).