Darien, King of Kjeldor + Sanguinary Priest + Vibrating Sphere

Prerequisites

• You control an additional creature.
• You have a way to cause the additional creature to die.
• It is not your turn.

Steps

1. 1During an opponent's turn, cause 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/-1 due to Vibrating Sphere 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