Originally Posted by
Jack_Simth
Indeed: Why? Why make a mere Paragon Pit Fiend when you can make a Paragon Half-Dragon (Silver) Half-Dragon (Gold) Half-Dragon (Copper) Half-Dragon (Brass) Half-Dragon (Bronze) Solar. But why stop there? Why not also toss in the Multi-headed template? Half-Fey? Half-Celestial? Half-Fiend? Phrenic?
"The creature must exist" combined with "Not everything possible within the rules necessarily does" makes a handy limiting factor.
Also, it's just Eschew Materials. Or maybe you work around the XP cost of Wish.