Agatha's Soul Cauldron, Oreskos Sun Guide, and North Pole Patrol

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Oreskos Sun Guide on the battlefield
• North Pole Patrol in exile

Steps

1. Activate Oreskos Sun Guide using North Pole Patrol's ability by tapping it, untapping another creature you control that has a +1/+1 counter on it
2. Activate the other creature using North Pole Patrol's ability by tapping it, untapping Oreskos Sun Guide Oreskos Sun Guide triggers, causing you to gain 2 life
3. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers