Altar of Dementia + Memnite + Tempered Steel + and 2 others

Mana needed: {1}{U}{U}{R}

URW identity

Commander legal

The 5 combo pieces

What must be in place

You have four or more cards in your graveyard.

How to execute it

  1. Cast Underworld Breach.
  2. Activate Altar of Dementia by sacrificing Memnite, milling yourself for three.
  3. Cast Memnite by exiling three cards from your graveyard that are not Thassa's Oracle.
  4. Repeat steps 2 and 3 until you have no cards in library.
  5. Cast Thassa's Oracle.
  6. Resolve its enter the battlefield trigger.

What the combo produces