Old Gnawbone, Kokusho, the Evening Star, and Galazeth Prismari are examples of commanders that happen to be dragons but arent great dragon commanders since they have no inherent synergy with other dragons
The promise of some extra mana can absolutely make your opponents start pinging each other, making them the very group slug resources you need
Two prebuilt Commander decks with fitting legendary creatures have been built as a result
By the way, Ive been doing Commander articles for a few years and I wanted to address the fact that I missed covering the reprints in Innistrad Remastered
Weve been burned a lot in the past couple of years by similar cards (Call the Bloodline comes to mind), but the rate of repeat, the tangible impact of a 2/2 flier, and the fact that it is often additive on a cantrip makes Drake Haven the real deal
If you cast a creature spell this way, it gains haste until you lose control of that creature (or, in rare cases, you lose control of the creature spell while it's on the stack)
