Darien, King of Kjeldor + Sanguinary Priest + Vampirism

Prerequisites

• You control an additional creature.
• You have a way to cause the additional creature to die.
• Vampirism attached to any creature you control, except the aforementioned additional creature.

Steps

1. 1Cause the additional creature to die.
2. 2Sanguinary Priest triggers, dealing 1 damage to you and causing you to gain one life.
3. 3Darien triggers, creating a 1/1 Soldier creature token.
4. 4The Soldier enters the battlefield as a 0/0 due to Vampirism and dies as a state-based action due to having zero toughness.
5. 5Repeat from step 2.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite lifegain triggers