Infernal drake change idea

What if instead of giving a % ad ap increase it would give a different buff

What if it give you a buff which worked similar to
A buff that charges up and at full charge your next ability/ attack applies a burn effect to enemies hit dealing x amount of true damage maybe something like 20/40/60 base damage + up to 90 extra based on level for a maximum of 150 at 3 dragons Charge up gets faster with more infernal drakes and it gets a small damage increase too

So at first it charges slowly but with 3 drakes it can charge up a bit faster so it's similar charge up time to statik shiv

Would be more interesting then some bland stat stick that only benefits ad and ap carries