Is it possible to customize the attack line in spells?

Like bolts spells.

Your hands glow with power as you invoke the phrase for Minor Fire...
Your spell is ready.
You gesture at a hill troll.
You hurl a stream of fire at a hill troll!

Is it feasible to have the bolded part customized?

I would think that would be a service people would be very interested in.

http://i.imgur.com/lsWPzG9.gif