This is where Darien starts to get really spicy. The ability to turn self-harm into creatures into self-harm into more creatures is the basic idea behind most of the combos with Darien out, and we have a great selection of cards to get us there.
Tutors
Here's a list of every tutor effect in the deck and the 3 cards I usually target with them in a general priority order. This is by no means a definitive list, as tutors are intended to strengthen the toolbox capabilities of the deck as much as find combo pieces, but hopefully serves as a good starting point with what to prioritize with each tutor.
Combos
Yay! We're at my favorite part of the deck! FYI, when I mention 'Soul Warden' in combos, any of the following creatures apply: Soul Warden, Soul's Attendant, Suture Priest, and Daxos, Blessed by the Sun. Mentioning 2 Soul Wardens can apply to 2 or more of the 1-life-per-creature crew or Daxos on his own. 'Sac Outlet' refers to the free sac outlets Ashnod's Altar, Phyrexian Altar, Fanatical Devotion, or Altar of Dementia, with each having their own advantages. Ok, with that out of the way, let's jump straight into this nonsense:
- Darien, King of Kjeldor + Blasting Station + 2 Soul Wardens + Any Other Creature = infinite life. Ping yourself for 1 by sacking any other creature to the Station, make a token, gain 2 life, untap Blasting Station, repeat with the token. Also turns into infinite damage and tokens with 1 Soul Warden and Anointed Procession.
- Darien, King of Kjeldor + Dingus Staff + Sac Outlet + 2 Soul Wardens + Any Other Creature = infinite tokens, life, and sac outlet benefits. First creature dying deals 2 damage to you, makes 2 tokens, gains 4 life, repeat with a token. Produces infinite mana with a mana-producing sac outlet, which allows for drawing of the whole deck with Skullclamp, or infinite mill for the win with Altar of Dementia and 1 Soul Warden. Also works with 1 Soul Warden and Anointed Procession.
- Darien, King of Kjeldor + Urborg, Tomb of Yawgmoth + Karma = lots of damage to opponents and tokens. Urborg (which doesn't have a black color identity!) turns all lands into swamps, then each player takes lots of damage on their upkeep. Honestly, this deck would probably be stronger if these two cards were dropped and the list focused only on infinites, but it's just too funny as hell and not that hard to set up. This will burn your opponents out in a few turns and the drawback is negated by a Soul Warden effect. It also gives the deck some extra oomph through effects like Stony Silence or Rest in Peace. Finally, experienced EDH players will see an infinite through a sac outlet coming from a mile away, so this provides a more innocent-looking and more-likely-to-resolve method of making a huge board.
- Karmic Guide + Reveillark + Sac Outlet = infinite recursion of creatures w/ power 2 or less and sac outlet benefits. Sac Karmic, sac Reveillark to bring back Karmic (and another <2 power creature optionally), Karmic ETB brings back Reveillark, repeat. Produces infinite mana with Ashnod's or Phyrexian, infinite mill with Dementia, or infinite damage with Blasting Station (although you do have to stack your triggers properly). This well-known combo gives the deck some reach if Darien is too expensive to cast. Unfortunately, there is no way in white to tutor for Reveillark and Karmic is fetchable only with Recruiter of the Guard, but luckily both cards are strong enough to warrant a deck slot on their own.
Other Win Conditions
Despite our best efforts to tutor and draw cards, it just isn't white's strength. White is, however, quite good at making an absurd amount of absurdly large dorks and doming your opponent for 600. Since our opponents most likely won't attack us with Darien out, we need a way to hurt ourself and manage our life total. 5 colorless or white pain lands, most notably Ancient Tomb, provide a constant stream of bruises and scrapes we can channel into tokens. Additionally, Mana Crypt and Mana Vault's damage-dealing abilities turn into upside (as if they couldn't get even more broken). This stream of a couple tokens per turn while we sit there innocuously can turn into a gargantuan army with the help of Cathars' Crusade, Elesh Norn, Grand Cenobite, or my favorite, Coat of Arms. Just 6 tokens and Darien with Coat represents 51 damage! As with all go-wide decks, an opponent's wrath could induce serious card and resource disadvantage. Avacyn, Angel of Hope, Eldrazi Monument and Selfless Spirit all provide indestructibility against most wraths in the format. Teferi's Protection is a great catch-all for staying alive or protecting any number of permanents from removal.