I was answering the OP's question. Simple question, simple answer.
Maybe a better question to pose would be,
"With respect to game lore, how does the blowing up the enemy Nexus create a defeat?"
I wish I had a good answer for that question, but Riot threw out most of the old lore.
The old explanation is that the Nexus is where the Summoners power basically comes from. One team breaks the link forcing the other summoners out of the game, and that team wins the game.
By the way, eschaton is a word, escheton seems like a troll move to get ashitton as a username.