Chainer, Dementia Master, Wurmcoil Engine, Phyrexian Altar, and Verdant Sun's Avatar

Prerequisites

• Chainer, Dementia Master on the battlefield
• Wurmcoil Engine on the battlefield
• Phyrexian Altar on the battlefield
• Verdant Sun's Avatar on the battlefield
• Your life total is at least 4
• available

Steps

1. Activate Phyrexian Altar twice by sacrificing the Wurm tokens, adding
2. Activate Chainer by paying and 3 life, putting Wurmcoil Engine from your graveyard onto the battlefield
3. When Wurmcoil Engine enters the battlefield, Verdant Sun's Avatar triggers, causing you to gain life equal to Wurmcoil Engine's toughness
4. Activate Phyrexian Altar by sacrificing Wurmcoil Engine, adding
5. When Wurmcoil Engine dies, it triggers, creating two 3/3 Wurm artifact creature tokens
6. When the Wurms enter the battlefield, Verdant Sun's Avatar triggers twice, causing you to gain life equal to the Wurms' combined toughness
7. Activate Phyrexian Altar twice by sacrificing the Wurms, adding
8. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain