Teysa Karlov 2.0 (EDH / Commander)

Original deck : http://tappedout.net/mtg-decks/making-them-pay-for-it-teysa-karlov-edh/

Combos:

Blasting Station + Darkest Hour + Teysa, Orzhov Scion :
This combo will kill your opponents through infinite damage. Since Darkest Hour makes any creature black card, Teysa, Orzhov's second ability will be triggered infinte times which will infintely untap Blasting Station so you can tap it for infinite damage. All you need is a creature to sacrifice with Blasting Station to start the chain.

Darkest Hour + Grave Pact + Teysa, Orzhov Scion + Dictate of Erebos:
The procedure is the same as before. Find yourself a sac outlet, sacrifice a creature and Teysa, Orzhov Scion will trigger thanks to Darkest Hour. The creatures, dying, will cause your opponents to sacrifice all their creatures to Grave Pact or Dictate of Erebos .

Darkest Hour + Teysa, Orzhov Scion or Ashnod's Altar / Phyrexian Altar :
This is an infinite mana combo. Either colored or colorless. All you need again is a creature to sacrifice to start the chain.

Darkest Hour + Teysa, Orzhov Scion + Viscera Seer :
An infinite scry combo. Sacrifice a creature with Viscera Seer then Teysa, Orzhov Scion triggers. The scry basically allows you to search for a certain card and put it on top of you library. This way you can search for some kind of win condition or an answer you desperately need.

Darkest Hour + Sadistic Hypnotist + Teysa, Orzhov Scion:
This is a crippling combo for your opponents since it basically empties their hands. The mechanism is always the same, prior you need a creature to sacrifice and then starts the chain.

Altar of Dementia + Darkest Hour + Teysa, Orzhov Scion:
The infinite mill combo. Sacrifice a creature with Altar of Dementia, choose an opponent as target, get the Teysa, Orzhov Scion trigger and repeat until your opponents are left without cards.

Blood Artist + Darkest Hour + Teysa, Orzhov Scion + Falkenrath Noble + Zulaport Cutthroat:
An infinite drain combo. Sacrifice a creature with some kind of sac outlet and then all the spirits Teysa, Orzhov Scion creates. This way your aristocrats will drain all your opponents to death.

Blood Artist + Requiem Angel + Divine Visitation + Zulaport Cutthroat + Falkenrath Noble:
The infinite Angel-Spirit-combo. Sacrifice a non-spirit and Requiem Angel will trigger. As the spirit token enters Divine Visitation will trigger and turn your spirit into an angel. Sacrifice your angel to one of your outlets and the chain will restart. Adding in one of your aristocrats you will drain to death the whole table.

Ashnod's Altar + Divine Visitation + Requiem Angel + Phyrexian Altar:
Same logic as the combo above. Sac a non-spirit with Ashnod's Altar or Phyrexian Altar , Requiem Angel will trigger which in turn will trigger Divine Visitation. This will generate infinite mana to spend as you want.

Altar of Dementia + Divine Visitation + Requiem Angel:
An infinite mill combo. Sac a non-spirit with Altar of Dementia, then Requiem Angel will trigger leading to a Divine Visitation trigger. Sacrifice the newly made angel and sacrifice it to Altar of Dementia to repeat the chain. This will mill out all your opponents.

Blasting Station + Divine Visitation + Requiem Angel:
An infinite damage combo. Sacrifice a non-spirit and get the Requiem Angel trigger. Divine Visitation will trigger and turn it into an angel. Meanwhile your Blasting Station will have untapped, so just tap it, sacrifice your angel token and Requiem Angel will trigger again. Repeat the chain to kill all your opponents.

Phyrexian Altar + Reassembling Skeleton + Requiem Angel :
Infinite drain combo with Blood Artist , Falkenrath Noble , Zulaport Cutthroat.
Sacrifice Reassembling Skeleton to Phyrexian Altar to generate one black mana. As it dies Requiem Angel will trigger and get you a spirit token. Sacrifice it to Phyrexian Altar to get another black mana and use that mana to return Reassembling Skeleton from your graveyard to play. Repeat the chain to generate infinite drain triggers.
Switch the aristocrats for Grave Pact / Dictate of Erebos / Dark Prophecy or Black Market for infinite removal, draw and ramp.

Ashnod's Altar + Grave Titan + Nim Deathmantle:
Play Grave Titan who will give you two zombie tokens. Sacrifice one of the tokens and Grave Titan to create four colorless. As he dies, Nim Deathmantle will trigger. Pay the four colorless with the mana you just created and Grave Titan will re-enter the battlefield creating you two more tokens. Repeat that process and you will always have one token ahead creating you an infinite army of zombies.
Combine them with some of your aristocrats, Blasting Station , Altar of Dementia and other ETBs to kill or cripple your opponents.

Yawgmoth, Thran Physician + Undying Creature ( Geralf's Messenger / Butcher Ghoul ) + Draining Creature ( Blood Artist / Cruel Celebrant )