Proposed Canon
A dwagon is a non-humanoid flying Unit with a strong melee combat capacity (via teeth, claws and tail) as well as a ranged projectile (typically a breath weapon). A dwagon can be mounted by a rider,Erf-b1-p003Erf-b1-p006Erf-b1-p031 and can carry a passenger in addition.Erf-b1-p041Erf-b1-p116 They are described as "big, scaly, flying lizards with lots of teeth and a bad attitude".Erf-b1-p026 They are only known to be popped at Gobwin Knob, but they also occur as a "wild" unit. Wild units pop randomly, with dwagons in the Minty Mountains popping with a probability of about 1 in 200 for any given hexsummer-updates-035 . Presumably wild dwagon can be seen flying in the distance on the very first page.
Dwagons can be "plated" (armored, like horse barding). It is unclear how this is done: Fabrication, randomly when popped, a shmucker-costing upgrade, etc. It is also unknown whether it is a permanent or temporary upgrade, or if the plating can be moved from one dwagon to another, or whether it is in fact a natural shell which individual dwagons can grow upon reaching a certain level.
Dwagons are incapable of carrying Heavy units as seen when Parson orders a yellow Dwagon to let him mount it only to fall slowly to the ground.
 First Appearance
 Known Dwagon Users
So far the only side known to use Dwagons is the Gobwin Knob faction led by Stanley the Tool, though it has been implied that there are other sides also capable of using them. It is repeatedly stated that he controls them through the use of the Arkenhammer. But they can be tamed without it as Jillian demonstrates by offering a feral one the bodies of several high elves to feed on.
 Dwagon Types
|Red||Can Combo Attack with a Green Dwagon increasing its fire breath damage||FireErf-b1-p012Erf-b1-p031Erf-b1-p050|
|Brown (or Black)||SmokeErf-b1-p031|
|Green||Can Combo Attack with a Red Dwagon increasing the Red's fire breath damage||Gas cloudErf-b1-p050|
|Pink||Weaker typeErf-b1-p056Erf-b1-p058||Pink bubblegumErf-b1-p031Erf-b1-p050Erf-b1-p057|
|Yellow||Weaker typeErf-b1-p056Erf-b1-p058||"Acidic Battlecrap"  Erf-b1-p006 Erf-b1-p031summer-updates-032|
 Additional Information
There are no more black / brown dragons in Erfworld. The story is that during a dramatic story moment in The Order of The Stick Elven mage Vaarsuvius cast an epic spell which wiped out a quarter of all black dragons... which included all of Erfworld's black dragons. Yes, the spell cast by Vaarsuvius was that powerful.
For the purposes of printing the Erfworld books all black / brown dragons were Retconjured to purple.
- 1. ^ Balder, Rob. Erfworld - a knol by Robert Balder. http://knol.google.com/k/robert-balder/erfworld/23skug9txczm1/2 .