Crucible of Worlds, Field of Ruin, Ob Nixilis, Unshackled, and Rings of Brighthearth

Prerequisites

• Crucible of Worlds on the battlefield
• Field of Ruin on the battlefield
• Ob Nixilis, Unshackled on the battlefield
• Rings of Brighthearth on the battlefield
• You must have a land drop available
• Four nonbasic lands under opponents' control
• available

Steps

1. Activate Field, targeting a land and triggering Rings of Brighthearth
2. Pay to copy the Field effect, targeting a different land
3. Resolve both triggers and the resulting Ob Nixilis triggers, forcing all opponent to lose 20 life
4. Use Crucible of Worlds to play Field
5. Repeat steps 1-3

Results

• Each opponent loses 40 life