Game Plan: Like White-Black Control, this deck wants to kill everything the opponent plays. The biggest difference is the use of Traverse the Ulvenwald to play a creature package as finishers, including Emrakul herself. It also has Grim Flayer, Sylvan Advocate, and Tireless Tracker, which give it a legitimate attacking angle.

Emrakul's Devoted Followers: Grim Flayer and Liliana fill the graveyard, and Traverse finds the Emrakul. This isn't the most dedicated delirium/mill deck, but it reliably finds and casts Emrakul by about turn eight or so.

Rating: Four tentacles out of five. Black-Green Delirium is the most midrange-y deck in the Top 8, and as a result can struggle with the bigger Emrakul decks. Languish isn't the card you want in those matchups, and this deck is a little heavy on removal. I'd look to play this if I expected more Bant, as having all the removal spells does help there.

source: http://magic.wizards.com/en/articles/archive/top-decks/lessons-and-emrakuls-2016-08-12