This deck (and earlier iterations) took me from Gold to top 30 mythic. (Currently top 50 as of last night. Lost some ranks down to 120ish and had to use this deck to get back to top 50) I had not tracked the deck until the last the last couple of days and have a 24/9 record (72%) with all matches in in upper Mythic (So much mono black! 9-3 vs mono black btw)

I tried submitting to CGB, Jim Davis and a few others but no takers. I did see Legend had a similar deck, but this is a better version (IMO, but I tried many of the cards he has and landed here). Just putting it out there as I have yet to play a mirror match in mythic, and the deck is legit. Probably not S tier, but a strong A tier. Very weak vs Enchantments though, but luckily, haven't seen many so far.

"Just Kill Me"
4 Dennick, Pious Apprentice (MID) 217
4 Elas il-Kor, Sadistic Pilgrim (DMU) 198
4 Thalia, Guardian of Thraben (VOW) 38

4 Raffine, Scheming Seer (SNC) 213
3 Toluz, Clever Conductor (SNC) 228

4 Ratadrabik of Urborg (DMU) 213
4 Sheoldred, the Apocalypse (DMU) 107

4 Ertai Resurrected (DMU) 199

2 Liesa, Forgotten Archangel (MID) 232

1 Swamp (UST) 214
4 Plaza of Heroes (DMU) 252
4 Shattered Sanctum (VOW) 264
2 Plains (UST) 212
4 Raffine's Tower (SNC) 254
4 Shipwreck Marsh (MID) 267
3 Adarkar Wastes (DMU) 243
2 Takenuma, Abandoned Mire (NEO) 278
2 Otawara, Soaring City (NEO) 271
1 Eiganjo, Seat of the Empire (NEO) 268

Bo3?

Sorry, only have played BO1 with it, so haven't worked up a sideboard at all. TBH, guessing it would lose some power in BO3.