Darien, King of Kjeldor, Phyrexian Vindicator, Catapult Squad, and Essence Warden

Prerequisites

• Darien, King of Kjeldor on the battlefield
• Phyrexian Vindicator on the battlefield
• Catapult Squad on the battlefield
• Essence Warden on the battlefield

Steps

1. Declare Phyrexian Vindicator as an attacker
2. Holding priority, activate Catapult Squad by tapping two Soldiers, attempting to deal 2 damage to Phyrexian Vindicator
3. The damage is prevented due to Phyrexian Vindicator's replacement effect
4. Phyrexian Vindicator triggers, dealing 2 damage to you
5. Darien triggers, creating two 1/1 Soldier creature tokens
6. When the Soldiers enter the battlefield, Essence Warden triggers twice, causing you to gain 2 life
7. Repeat from step 2

Results

• Infinite ETB
• Infinite lifegain triggers
• Infinite tapped creature tokens