Yes there is

Lol nope but it's slower then Sunbreaker one gbi Edit: gbi = tho

Due to the obvious difference between the 2, here is a picture of a toaster.

Hungering blade only triggers on Arc Melee ability kill and doesn't have a cool down

No, but Arc Blade doesn't even last 3 seconds. Slight exaggeration there but in all seriousness, Hungering Blade doesn't have a cooldown because you need to be literally in people's faces to trigger it. Honestly if you've used Arc Blade against good opponents you'd see first hand that you take MASSIVE damage when you're getting up close and personal. Hammers can be thrown all over the place from any distance. It was given a cooldown to stop you tanking an entire team from one end of the map to the other with zero effort.

But bladedancer has to be up close and personal and sunbreaker can throw across the map to get regen kills

3 seconds isn't even that long take a chill pill dude

No