Thor closes his eyes, wills himself to look okay and not the way he feels right now. Tony's mourning a reality Thor hopes doesn't exist for him. He doesn't want Tony to see his nightmare come true.

And if knowing where the Infinity Stones are isn't enough to stop him, he truly hopes that Thanos kills Tony before he can see everyone turn to dust.

Thor wraps his arms around him and pulls him close so that even Tony's unsteady legs give beneath him, he can still hold him up.

Thor wants to tell him he'll kill Thanos, that he'll spend the rest of his life hunting him down and then destroy the Infinity Stones right then and there so it never happens again. He couldn't stop Thanos with Stormbreaker, but perhaps a weapon that was so powerfully-forged could shatter all six of them.

But he knows it's not going to change anything.