Ghouls' Night Out, Phyrexian Altar, Headless Rider, and Shipwreck Dowser

Prerequisites

• Ghouls' Night Out in hand
• Phyrexian Altar on the battlefield
• Headless Rider on the battlefield
• Shipwreck Dowser in the graveyard
• At least two of your opponents have a creature card in their graveyard
• available

Steps

1. Cast Ghouls' Night Out by paying , returning Shipwreck Dowser from your graveyard to the battlefield, and at least two other creatures from your opponents' graveyards to the battlefield under your control
2. When Shipwreck Dowser enters the battlefield, it triggers, returning Ghouls' Night Out from your graveyard to your hand
3. Activate Phyrexian Altar three times by sacrificing Shipwreck Dowser and the two creatures your opponents own, adding
4. When the three creatures die, Headless Rider triggers three times, creating three 2/2 Zombie creature tokens
5. Activate Phyrexian Altar twice by sacrificing two Zombies, adding
6. Repeat

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count