Karrthus, Tyrant of Jund Jund colors boast the most dragons, and if youre looking to build a Commander typal deck around them, Karrthus, Tyrant of Jund is a great choice for a dragon commander
The firebreathing is overcosted, but never underestimate a hasty flier
To decks with high degrees of mana rocks and friends like Sol Ring, Voltaic Key, and Grim Monolith to stuff like aggressive decks that dont care about the mana, just the smashing, and use Armageddon to prevent you from answering their quick threats
Otherwise, you can enjoy the scry 2, as above
Non basic lands are the first cards where I actually care about the ability box
Dromokas Command (Fight Green/White Instant) [c]Dromokas Command[/c] lets you choose two of the following: Prevent all damage a spell would deal, have an opponent sacrifice an enchantment, give one of your creatures a +1/+1 counter, or even have one of your creatures fight