Quote Originally Posted by Fyraltari View Post
It's hard to see where the two first strikes land exactly because of cuts, but the third one happens after Mantis has moved her hands out of the way and it still hurts Thanos.
Hurts, maybe. But it doesn't do any damage. In fact, he reacts about as much to having a grenade planted on him, or Iron Man bombarding him with missiles.

In the end he calls it out. For all their attacks, for all the explosions, guns, fancy magic, and physical might, they only manage to draw a single drop of blood. That's the only actual injury we see him take.