Thor subconsciously refused again. "No, it's also an Infinity Stone… Uh, wait, why do you want it back?"
It had to be pointed out that it was Big Dipper who had snatched Loki's scepter and the Tesseract back then, before Thor took the Tesseract away.
Now, why did he want the Tesseract back?
Big Dipper said indifferently, "Because the Dark Elves snuck into the Royal Palace of Asgard, attacked the dungeon, and stole the Aether."
At that point, he turned to look at Thor and said slowly, "We took back the Aether and brought it to Asgard for a trade, not as a gift. After all, you've proven that you can't safeguard the Infinity Stones."
Thor was depressed. He thought for a moment, then shook his head. "When you had the Tesseract, you attracted the Chitauri…"
Big Dipper interrupted him bluntly. "That was Loki who caused the trouble. Also, we took it back."
Thor put up one last struggle. "I participated in the battle too…"
