Agatha's Soul Cauldron, Sphinx's Disciple, and Kelpie Guide

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Sphinx's Disciple on the battlefield
• Kelpie Guide in exile

Steps

1. Activate Sphinx's Disciple using Kelpie Guide's ability by tapping it, untapping another creature you control that has a +1/+1 counter on it
2. Activate the other creature using Kelpie Guide's ability by tapping it, untapping Sphinx's Disciple Sphinx's Disciple triggers, drawing a card
3. Repeat

Results

• Infinite card draw
• Infinite draw triggers