How it works
Prerequisites
- Vohar is your commander and does not have summoning sickness.
- Deceiver Exarch does not have a +1/+1 counter on it.
Steps
- 1Activate Vohar's first ability by tapping it.
- 2Vohar triggers, giving creatures you control that share a creature type with it +2/+0 and undying until end of turn.
- 3Resolve the Vohar ability from step 1, causing you to loot.
- 4Activate Phyrexian Altar by sacrificing Deceiver Exarch, adding one mana of any color.
- 5When Deceiver Exarch dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
- 6When Deceiver Exarch enters the battlefield, it triggers, untapping Cauldron of Souls.
- 7Activate Cauldron of Souls by tapping it, giving Deceiver Exarch persist until end of turn.
- 8Activate Phyrexian Altar by sacrificing Deceiver Exarch, adding one mana of any color.
- 9When Deceiver Exarch dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- 10When Deceiver Exarch enters the battlefield, it triggers, untapping Vohar.
- 11Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?