___ARG___
In Endgame we see Thanos simultaneously hold off the trio of Cap, Tony, and Thor with ease using his signature double bladed sword. But do we ever learn where it comes from or how he got it. And what is it made out of. He nearly shattered Caps shield, and it withstood multiple heavy strikes from Stormbreaker and Mjolnir. Feel like it has to be one of the stronger weapons in the MCU but just never gets talked about.
