Hearthpwn

Another version of Undeadlock, another legend acquired this month. This time with Titans set (and mini set), so some cards had to be removed to make place comparing to Undeadlock 2.0 (https://www.hearthpwn.com/decks/1428406-undeadlock-2-0):

-2 Felstring Harp

-1 Habeas Corpses

-2 Hellfire

-2 Siphon Soul

-1 Twisting Nether

-2 Tour Guide

-1 E.T.C., Band Manager

+2 Forge of Wills

+2 Mortal Eradication

+2 Reverberations

+2 Imposing Anubisath

+1 Sargeras, the Destroyer

+1 The Sunwell

+1 Yogg-Saron, Unleashed

So 11 cards changed (worth noting that comparing to first version from May, with rotation and introduction of 2 big sets and 2 mini sets, we still have 15 cards from that version, exactly half of the deck). Obviously Titans added a lot of power to both early and late game, but also Reverberations from previous expansion started to shine both with Titans expansion and... Thaddius nerf. Sometimes you want to cast it on your own Thaddius for very very explosive turns casting almost everything for 0/1 mana.

This list is very similar to the most popular Chadlock build at the moment, with 2 changes - I swapped Loken, Jailer of Yogg-Saron and 1 Habeas Corpses copy for Yogg-Saron, Unleashed and The Sunwell. Loken seems too slow and unimpactful for a 6 drop and Habeas Corpses sometimes just doesn't have good discovery options. Yogg-Saron is actually still quite powerful even after nerf and The Sunwell is especially powerful with post-nerf Thaddius, you can cast a lot of its spells for 0 mana.

edit: got legend with this one in November (4th) as well although climbing through horde of Mages, Rogues, Paladins and Warriors is not easy...