How it works
Prerequisites
- Rancor attached to another creature you control.
Steps
- 1Activate Phyrexian Altar by sacrificing the creature with Rancor attached, adding .
- 2When Rancor leaves the battlefield, it and Warehouse Tabby trigger.
- 3Resolve the Warehouse Tabby trigger, creating a 1/1 Rat creature token.
- 4Resolve the Rancor trigger, returning it to your hand from your graveyard.
- 5Cast Rancor by paying , attaching it to the Rat token.
- 6Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?