If gabriel can be killed with a অ্যাঞ্জেল blade why cant lucifer i know this is a old প্রশ্ন

Lucifer probably could have been killed using an অ্যাঞ্জেল অথবা archangel blade, but no one thought of using one against him.

it could be that he was an অ্যাঞ্জেল but he have become a demon so he might be a dangel now and an অ্যাঞ্জেল blade won't kill him

He's pretty damn fast and strong. Gabriel was an archangel and still couldn't beat him, maybe Micheal could though. Having the blade doesn't mean আপনি can get a hit in. It wouldn't be as easy as with Zachariah.

Normal অ্যাঞ্জেল blades don't work on Archangels so they have special blades (Archangel Blades) that can kill other দেবদূত but are the only thing that can kill each other. Lucifer cannot be killed with one of the normal অ্যাঞ্জেল blades since he is an Archangel and he used his Archangel blade to kill Gabriel. (don't worry I thought about this a lot when I first watched Supernatural)

Gabriel wasn't killed with an অ্যাঞ্জেল Blade he was killed with his own Archangel Blade which is আরো powerful and rare to come দ্বারা since only Archangels possess them.

I think it's because certain fallen দেবদূত can't be killed , like Lucifer.