You will find a couple of DS decks that play 2x Avaricious Dragon over at MTC TC Decks. Here's what I'd do for a Stormbreath Dragon build. It uses the Hellbent skeleton, dropping the Hellbent elements for more reliable offense:

4x Magus of the Moon
4x Simian Spirit Guide
4x Goblin Rabblemaster
4x Thunderbreak Regent
3x Stormbreath Dragon

3x Koth of the Hammer

4x Seething Song
4x Blood Moon
4x Chalice of the Void
3x Trinisphere
4x Chrome Mox

4x City of Traitors
4x Ancient Tomb
11x Mountain

Numbers may need some tinkering here and there, but the idea is that you drop the Taurean Mauler for Rabblemaster, and Koth's there in place of Gathan Raiders while Regent takes the place of Rakdos Pit Dragon and SBD is there in place of Arc Slogger.