Containment Construct + Ketramose, the New Dawn + Prognostic Sphinx + Sheoldred, the Apocalypse

WUB identity

Commander legal

The 4 combo pieces

• Containment Construct
• Ketramose, the New Dawn
• Prognostic Sphinx
• Sheoldred, the Apocalypse

What must be in place

You have a card in hand.
Your life total is at least 2.

How to execute it

1. Activate Prognostic Sphinx by discarding a card.
2. Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
3. Ketramose triggers, causing you to draw a card and lose 1 life.
4. Sheoldred triggers, causing you to gain 2 life.
5. Resolve the Prognostic Sphinx ability.
6. Repeat.

What the combo produces

• Exile your library with the ability to play the exiled cards until end of turn
• Infinite draw triggers
• Infinite rummaging
• Infinite self-discard triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers