Agatha's Soul Cauldron, Inquisitive Puppet, and Zameck Guildmage

Prerequisites

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

Steps

1. Activate Zameck Guildmage's first ability by paying , causing each creature you control to enter the battlefield with a +1/+1 counter on it this turn
2. Activate another creature you control that has a +1/+1 counter on it by exiling it, creating a 1/1 Human creature token that enters the battlefield with a +1/+1 counter on it due to Renata
3. Repeat step 2 using the Human token instead

Results

• Infinite ETB
• Infinite LTB