There is one weapon in the Marvel Universe that is able to cut through every known substance, including Wolverine's adamantium skeleton: the Ebony Blade. This legendary sword is usually wielded by the Black Knight, and it already made its debut in the post-credits scene in Eternals, which shows Kit Harrington's Dane Whitman opening an ominous case that contains a black sword - the Ebony Blade.
from Screen Rant https://ift.tt/pe2JkCQ