Since Jaws itself is the source of the damage, you can also get a lot of value out Equipment like Basilisk Collar
For a deck that still needs to attack to win, Quick Draw has far too few board sweepers to shake up a stale board state
I did say that I dislike Cabal Coffers and similar Mono Black Control lands in this deck, but lands that 1) enter untapped and 2) tap for B are always worth considering: Shizo, Death's Storehouse and Takenuma, Abandoned Mire are top on the list, but for colorless lands I think Nykthos, Shrine to Nyx can probably start ramping by turn 4 and Phyrexian Tower is worth testing too
The ultimate is no joke either, you do have to deal with Wrenn and Six else you are just going to eat endless Lightning Bolts from the bin and die to it
If you have a lot, subdivide by color within each set
Prominent from the dawn of MTG, dragons have had a whole MTG set dedicated to them in Dragons of Tarkir, and even gave rise to the popular Commander format, otherwise known as EDH or Elder Dragon Highlander