Cauldron of Souls + Deceiver Exarch + Haunted One + and 2 others

UB identity

Commander legal

The 5 combo pieces

What must be in place

Vohar is your commander and does not have summoning sickness.
Deceiver Exarch does not have a +1/+1 counter on it.

How to execute it

  1. Activate Vohar's first ability by tapping it.
  2. Vohar triggers, giving creatures you control that share a creature type with it +2/+0 and undying until end of turn.
  3. Resolve the Vohar ability from step 1, causing you to loot.
  4. Activate Phyrexian Altar by sacrificing Deceiver Exarch, adding one mana of any color.
  5. When Deceiver Exarch dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. When Deceiver Exarch enters the battlefield, it triggers, untapping Cauldron of Souls.
  7. Activate Cauldron of Souls by tapping it, giving Deceiver Exarch persist until end of turn.
  8. Activate Phyrexian Altar by sacrificing Deceiver Exarch, adding one mana of any color.
  9. When Deceiver Exarch dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  10. When Deceiver Exarch enters the battlefield, it triggers, untapping Vohar.
  11. Repeat.

What the combo produces