Agatha's Soul Cauldron, Famished Paladin, and Temple Elder

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Famished Paladin on the battlefield
• Temple Elder in exile

Steps

1. During your precombat main phase, activate Famished Paladin using Temple Elder's ability by tapping it, causing you to gain 1 life
2. Famished Paladin triggers, untapping itself
3. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers