Agatha's Soul Cauldron, Inquisitive Puppet, and First Day of Class

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Inquisitive Puppet in exile
• First Day of Class in hand
• You control another creature that has at least one +1/+1 counter on it
• available

Steps

1. Cast First Day of Class by paying
2. Activate another creature you control that has a +1/+1 counter on it by exiling it, creating a 1/1 Human creature token
3. When the Human enters the battlefield, First Day of Class triggers, putting a +1/+1 counter on it
4. Repeat from step 2 using the Human token instead

Results

• Infinite ETB
• Infinite LTB