In a private meeting, an enderman and a pigman discuss a dire issue, to prevent a war between the End and the Nether.
"Please, you speak of peace as if you actually believe we can have it, after what your race has done? Bah, you're nothing more than a foolish enderman, Cornelias."
"Well Cecil, what do you want, a war? A war will only cause us to destroy our already dying races? Surely you can come to reason with your Council of Elders?"
"The council has as much bloodlust as I do. This meeting between the two of us would not exist had your foolish citizen decided to steal our ancient relic, the Nether Diamond. Our kingdoms had a pact to never cross over into our territories uninvited. And especially not to steal anything, and above all, NOT TO KILL ANY CITIZENS."
"Yes, I-"
"And you now the consequences that must be upheld by the kingdom whom did the deed?"
"Yes, we know. We had him tied up and publicly executed via Void. Now, I don't want any war being raged between our kingdoms. And please be frank, you know we are not your true enemy. The Valkyries are our main threat."
"True, they do balance us out with their holy powers and strength, what about them?"
"The Nether Diamond is hidden in the Overworld, this much we know. The Overworld is protected by the Valkyrie, so harming its inhabitants would be a foolish gesture on our parts. However, we have made a special Potion of Masking to transform one of our citizens into a Worldling. The effects are permanent, but the strengths of our race are still within him. Those accursed harpies won't know he's there."
"And when you get us our Diamond back?"
"Yes, you must help us eliminate the Valkyrie race, once and for all."
"... You have 1 month."
"That's more than enough time, until then, brother."
"Half-brother."
"...Whatever."