How it works
Steps
- 1Activate Phyrexian Altar by sacrificing Ao, adding one mana of any color.
- 2Ao dies, triggering itself and Nim Deathmantle.
- 3Resolve the Ao trigger, putting four +1/+1 counters on each creature and Vehicle you control.
- 4Activate Workhorse by removing four +1/+1 counters from it, adding .
- 5Resolve the Nim Deathmantle trigger, causing you to pay to return Ao from your graveyard to the battlefield, and then attach Nim Deathmantle to it.
- 6Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?