Urabrask // The Great Work, Clock of Omens, Krark-Clan Ironworks, and Contagion Engine

Prerequisites

• Urabrask // The Great Work on the battlefield
• Clock of Omens on the battlefield
• Krark-Clan Ironworks on the battlefield
• Contagion Engine on the battlefield
• You've cast three or more instants and/or sorceries this turn
• available

Steps

1. Activate Urabrask by paying , exiling it and returning it to the battlefield as The Great Work
2. As The Great Work enters the battlefield, a lore counter is placed on it
3. The Great Work triggers, dealing three damage to an opponent and each creature they control
4. Activate Contagion Engine by paying and tapping it, putting two lore counters on The Great Work
5. The Great Work's second and third abilities trigger
6. Resolve the first Great Work trigger, creating three Treasure tokens
7. Resolve the second Great Work trigger, allowing you to cast instants and sorceries from graveyards this turn, and then exiling The Great Work and returning it to the battlefield as Urabrask
8. Activate Clock of Omens by tapping two Treasures, untapping Contagion Engine
9. Activate Krark-Clan Ironworks twice by sacrificing the two tapped Treasures, adding
10. Activate the final Treasure by tapping and sacrificing it, adding
11. Repeat

Results

• Infinite damage
• Infinite ETB
• Infinite LTB
• Infinite proliferate