Draconic Polymorph(Draconomicon, p. 79)
Level: Sorcerer 5, Wizard 5,
Casting Time: 1 standard action
Duration: 1 minute/level (D)
Saving Throw: None
Spell Resistance: No
As polymorph, except as follows: The assumed form can have no more Hit Dice than you have, to a maximum of 20 Hit Dice. Your Strength and Constitution in the new form are above the average for the race or species into which you transform; your Strength is the average for the creature +8, and your Constitution is the average for the creature +2.