It does cost a bit of mana to cast, but once it's on the battlefield, Lier, Disciple Of The Drowned becomes an instant threat with how much recursion it gives you
Beyond that, Meeting of Minds and Pile On could end up with spots in the list
It can be a viable creature in your green decks with little regard for is activated ability
One non-dragon commander that may like the Hellkite is Child of Alara, a WUBRG deck that may wipe the entire board to start things over, then reanimate threats like Two-Headed Hellkite to resume the offensive thanks to haste
Perhaps the closest comparison are super-deluxe limited-edition versions of games
If you start a draft off with an early Icy Blast, bias towards 4+ power creatures like Alpine Grizzly, Whirlwind Adept and Summit Prowler A three-power Prowess is usually good enough for ferocious, since it'll become a 4-power creature when you cast the spell