Krisnath just so you know there is a difference between powergaming and muchkinning. Powergamers teak characters to the max where as munchkins blatanly ignore rules. Sure the DM could say I could not cast that spel, but then he himself is admitting to the fact that he can't beat a character that has a spell well within the force of reason. That is like saying I can't use magic missile because the DM doesn't like it. The ELH was made with specific rules on spells thus they are not over powered. A force dragon of young adult age is only a CR 28. We are level 30-31 characters. And CRs are based on a party of four characters. Thus Summoning this dragon would give our party its fourth character. If the DM is frightened of that he should go back to the drawing board and make something stronger.