I'm pretty sure the dragon RNG is not actually random...
It's like the psuedo RNG with crit chance... but if you do get a dragon you have a better chance of getting it again. This is nice and all because snowballing teams can snowball even harder with 3 cloud drakes or 3 infernal drakes in a row (cloud is not useless, 45 movespeed is amazing, it's like having another pair of boots.)
with 3 cloud drakes is