How it works
Prerequisites
- You control another creature that has at least one +1/+1 counter on it.
Steps
- 1Activate another creature you control that has a +1/+1 counter on it by exiling it, creating a 1/1 Human creature token.
- 2When the Human enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control.
- 3Repeat using the Human token instead.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?