Archghoul of Thraben, Mortuary, Shambling Ghast, and Phyrexian Altar

Prerequisites

• Archghoul of Thraben on the battlefield
• Mortuary on the battlefield
• Shambling Ghast on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Shambling Gast, adding
2. Mortuary, Shambling Ghast and Archghoul of Thraben trigger
3. Resolve the Mortuary trigger, putting Shambling Ghast on top of your library
4. Resolve the Shambling Ghast trigger, choosing either to give an opponent's creature -1/-1 until end of turn or creating a Treasure token
5. Resolve the Archghoul of Thraben trigger, revealing Shambling Ghast from the top of your library and putting it into your hand
6. Cast Shambling Ghast by paying
7. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count
• Infinite Treasure tokens
• Reduce each opposing creature's toughness to zero