Orah, Cleric Tribal // Gain & Drain

Win Condition

Drain out your opponents' life totals. The best way to do this is with a combo, although it's theoretically possible to get there without over a long game. This is a relatively casual deck, so long games are typical.

Infinite Combos

Most of these take a bit of setup, and at least 3 cards to pull off (again, this is casual, not competitive). Nonetheless the deck has enough natural synergy your chances of getting to these combos are pretty good. With further tuning the deck will run even smoother, making a life drain combo win even easier. There could well be other combos in the deck that I'm missing, these are the big ones that stand out to me immediately.
Infinite Death/ETB Triggers

1. Leonin Relic-Warder + Animate Dead
2. Sun Titan / Karmic Guide / Reveillark + Doomed Necromancer + Lightning Greaves + Phyrexian Altar (Convoluted but still infinite.)

Infinite Death/ETB Triggers and Infinite colored mana / infinite scry

1. Sun Titan + Kaya's Ghostform + Phyrexian Altar / Viscera Seer
2. Fiend Hunter + Karmic Guide + Phyrexian Altar / Viscera Seer
3. Reveillark + Karmic Guide + Phyrexian Altar / Viscera Seer

Now pair any of those combos with any life gain/life drain synergies, such as:

• Syr Konrad, the Grim (Standalone drain, and if you have infinite mana Konrad could give you infinite mill too, although you'd need to be careful not to deck yourself.)
• Zulaport Cutthroat / Cruel Celebrant / Blood Artist (Standalone drain)
• Soul Warden / Soul's Attendant + Sanguine Bond / Marauding Blight-Priest / Vito, Thorn of the Dusk Rose (Gain & Drain)

Bonus Classic

• Sanguine Bond + Exquisite Blood + any lifegain to start the loop = you win!
  This one is a classic most players will have at least heard of if not seen before. I personally think this is a cheeky way to win the game and would prefer to, like, actually play the deck, haha - but I received an EB as a gift for this deck, and who am I to say no to one of the most legendary black combos there is? Enjoy!

Some Future Improvements

• More free sac outlets
• More general graveyard recursion
• Snow mana base to allow for inclusion of Draugr Necromancer instead of Athreos, Shroud-Veiled (The draugr is a cleric, and allows you to pick and choose what you get back from their boards. Athreos makes a good body since he’s indestructible, and can help save your own things; choose whichever option you like more.)