Avengers: Infinity War, but Loki didn't die.

Thanos: You shouldn't have wasted your words * (he said, grabbing Loki by the throat and gradually squeezing... while Thor, shackled in iron, watched all this and could do nothing...) *

Loki: ...you will never become a god... * (he wheezed before Thanos finally broke his neck and threw the body in front of Thor... he used the Infinity Gauntlet to blow up the ship and vanish with his people, leaving Thor in despair and grief... the ship exploded... the bodies of the other Asgardians were scattered across space... only a few of them were alive, as was Thor, who was found by the Guardians of the Galaxy and began heading to Earth after Thanos... Loki woke up on the remaining part of the ship, there were red marks from Thanos' hands on his neck, his skin had halfway become like that of the Frost Giants... and the dark entity began to awaken once again...) *

Loki: Thor! * (he shouted into the void, but there was no answer) * Brother!!!!!!! Hulk!!!!!!! Valkyrie!!!!!!! Does anyone hear me?! * (he shouted with all his might, his voice already trembling... but in response, there was only silence and the realization that his fear had come true... he is alone... there is no one but corpses... he let everyone down again... betrayed again... messed everything up again... he told himself, staring into the distance while the piece of the ship slowly and smoothly drifted somewhere) *