I always refer to wizards (historically the most difficult of all classes to play) as *her.*
I do this as a compliment to women.
Thus ...
The fighter/wizard confronts the dragon. She stands her ground against this powerful foe.
The dragon looses his flaming blast at her, but her Fire Shield spell protects her (she makes her save for no damage.) All around her the very stones glow, warp, and melt, but she stands indomitable and unharmed amidst the inferno.
She draws her vorpal sword, and with her free hand lets loose with a Lightning Bolt. The cavern rocks from the brilliant blue blast, thunder booming incessantly and deafeningly from one end to another, and the dragon shrieks in pain, the cry shattering stone, the combined sound bringing avalanches of stone down, plumes of dust rising all across the cavern.
The dragon brings his mighty claws to bear, slashing with crushing force, biting with teeth that would crush 10 suits of armor, delivering a tail smash that would pulverize stone, but the heroine's Stoneskin deflects all these attacks, the girl standing unmoved and defiant against the onslaught.
Now the girl leaps forward, and with a sweep of her vorpal sword, beheads the great dragon. Not even his massive dragon scales are proof against her weapon, keenest of all swords, and so the great monster is downed, finished by the girl, never to trouble the land again.
The girl climbs to the top of the corpse of the beast in triumph, regarding it coldly, looking around at the great treasure, satisfaction in her face that justice has been meted out against the one who stole and killed, who brought his wages of blood here, who has now been made to pay for his crimes.