Playstyle:

Slow down the game and counter anything that harms the combo

To start the combo, Smothering Tithe should be on board already and then you play Peer into the Abyss/Emergency Power

(Proper historic version: Infinite Win Cond. + 100+ Extra Turns) 

Mana Generation: 

Have Smothering Tithe on board

Cast Peer into the Abyss/Emergency Power again and again
(This will buff your Thousand-Year Storm even if it is not on board)
(Repeated Reverberation may help)

You may use Fae of Wishes to get these cards from sideboard in case you can't draw them 

If

• You have enough mana for Fae of Wishes and Peer Into Abyss
• 2 Smothering Tithe are on board

Usually, it is safe to finish off the combo

Getting cards from sideboard: 

Thousand-Year Storm + Fae of Wishes

100+ Extra Turns: Teferi, Master of Time, Thousand-Year Storm, Planewide Celebration/Contentious Plan, Repeated Reverberation x2

You may use other cards instead of Teferi

Like Jace, Wielder of Mysteries, you can draw your whole deck in one turn

You can also kill your opponent with Revenge

Quick win condition:

Peer into the Abyss + Folio of Fancies

Bonus(can be played along with 100+ Extra Turns, depending on how you manage your sideboard):

Taking control of all decks:

Bag of Holding->Peer into the Abyss->Folio of Fancies->Awaken the Erstwhile->Mnemonic Betrayal

Make sure you have enough mana to play all decks

If Thousand-Year Storm is on board, try to use Peer into the Abyss as the first/second sorcery spell in a turn so no one will die too early

Unmoored Ego combo:

Smothering Tithe + Thousand-Year Storm + Unmoored Ego (If you want mana only, go for the hand. If you don't want them to win, go for the core cards)

Nine Lives Betrayal:

Nine Lives + Wishclaw Talisman + Eyes Everywhere + Role Reversal + Shadowspear + Teferi, Time Raveler

Electrodominance combo:

Thousand-Year Storm + Gideon planeswalker + Electrodominance for less mana spending

Be careful when using Electrodominance. The additional spell is casted immediately

See Maybeboard

Other suggestions:

Smothering Tithe will take care of mana you need from other colours