Altar of Dementia + Kotis, Sibsig Champion + Timeless Witness

BGU identity

Commander legal

The 3 combo pieces

What must be in place

You have enough mana available each turn to cast the extra turn spell and enough mana each extra turn to cast Timeless Witness.
You have not cast a spell using Kotis

How to execute it

  1. Cast the extra turn spell by paying its mana cost, causing you to take an extra turn after this one.
  2. Move to your extra turn.
  3. Activate Altar of Dementia by sacrificing Timeless Witness, causing you to mill cards equal to Timeless Witness's power.
  4. Cast Timeless Witness from your graveyard by paying its mana cost and exiling three other cards from your graveyard, ensuring not to exile the extra turn spell.
  5. When Timeless Witness enters the battlefield, it triggers, returning the extra turn spell from your graveyard to your hand.
  6. Repeat.

What the combo produces