Doomsday + Necropotence + Nexus of Fate + Yennett, Cryptic Sovereign

Mana needed: {B}{B}{B}

WUB identity

Commander legal

The 4 combo pieces

What must be in place

Yennett does not have summoning sickness.
An opponent cannot block and kill Yennett.
Your life total is at least ten.

How to execute it

  1. Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Nexus of Fate and four other cards, then exiling the rest of your library and graveyard, putting the aforementioned cards on top of your library with Nexus of Fate being the bottom card, and causing you to lose half your life total, rounded up.
  2. Activate Necropotence four times by paying 4 life, exiling the top four cards of your library.
  3. Declare Yennett as attacker.
  4. Yennett triggers, casting Nexus of Fate from your library without paying its mana cost.
  5. Resolve Nexus of Fate, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
  6. Repeat from step 3 each turn.

What the combo produces