they're way too big of an objective, and by far the best of the elemental drakes.
And since drake rotations are RNG, that makes the game luck-based, if there is a comp with let's say a shyvana or a warwick, and they get an infernal drake very early since those champs can do it, the game is pretty much over. A single early inf. drake can easily snowball all the lanes to the favour of the team who picked a better jungle champ for that RNG. I just dont find it fair, I think they either shouldn't be able to spawn before at least the 15 min mark, or should just be replaced.