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

Mana needed: {8}

B identity

Commander legal

The 4 combo pieces

What must be in place

You must have a land drop available.
Four nonbasic lands under opponents' control.

How to execute it

  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.

What the combo produces