I was just looking through the wiki and I noticed there's already a special attack for sucking blood. That's pretty cool and I'm gonna go look through all the other attacks I don't know about.
The only special attacks out there currently are inject extract, (which can stun, paralyze, etc.) suck blood, firebreath, and dragonfire.
P.S. another cool thing would be the ability to add new damage types (burn, cold, gore, etc.) and edit the messages given for fatal blows and whatnot.